Question: When did Pharoah Khufu rule in Egypt?
About the article "Great Sphinx of Giza", section "Modern dissenting hypotheses".

Candidate passages:
In ancient Egypt, Pharaoh Khufu (Jack Hawkins) is obsessed with preparing his tomb for the "second life".
Dissatisfied with his own architects' offerings, he enlists Vashtar (James Robertson Justice), an ingenious man whose devices nearly saved his own people from being conquered and enslaved by Khufu.
Khufu offers to free Vashtar's people if he will build Khufu a robber-proof tomb - although Vashtar will have to die when the pyramid-tomb is completed, to guard its secrets.
During the years that the pyramid is being built, Pharaoh demands tribute and labor from all his territories, amassing gold and treasures to be interred with him.
Princess Nellifer (Joan Collins) comes as the ambassador of the tributary province of Cyprus.
Claiming her province is poor and cannot afford to pay the assigned tribute, she offers herself to Pharaoh instead.
She becomes Khufu's second wife.
Nellifer questions whether Khufu really had as much gold as he says, so she is shown an enormous hoard of fine gold artifacts and jewels, and more in an inner vault that Khufu is saving for his "second life."
She puts on an ornate, jewel encrusted necklace which Khufu angrily demands she remove.
When she doesn't, he orders Treneh (Sydney Chaplin), the captain of the guard, to take it off her and leaves.
Later, Nellifer starts an affair with Treneh.
who has become besotted with her.
One day on the construction site Vashtar's son, Senta (Dewey Martin), saves Khufu from being crushed to death by a runaway stone block.
In order to get the injured Khufu out of the pyramid to help, Senta reveals that he too knows the tomb's secrets, knowing that he must now share his father's fate.
A grateful Pharaoh offers him anything else within his power; Senta chooses Nellifer's slave Kyra to save her from being whipped for her fierce independence.
Using a cobra obtained from a snake charmer with the help of Treneh, Nellifer plots to assassinate first Queen Nailla and her son Zanin, then Khufu, leaving her to rule Egypt.
First, Treneh persuades Khufu that there is a rich hoard of treasure in a tomb far to the north, in order to draw him away from the palace.
Then Nellifer gives Zanin a flute to practice and teaches him a tune the snake will be attracted to.
Queen Nailla sees the snake approaching Zanin and throws herself on it to save her son.
After hearing of the queen's death, Khufu sends out investigators to look for snake charmers.
Panicking, Nellifer dispatches her servant Mabuna to kill Khufu at the oasis, but Mabuna only manages to wound Khufu before being killed.
Suspecting Nellifer, Khufu rushes back to the city.
In her chambers he overhears her and Treneh plotting; he kills Treneh in a sword fight, but is himself fatally wounded.
During Pharaoh's funeral his High Priest and lifelong friend Hamar, (Alexis Minotis, billed as Alex Minotis), has Nellifer accompany him into the burial chamber because she "must give the order" to seal the sarcophagus.
When her order is obeyed, it releases a large stone in a lower chamber, triggering Vashtar's mechanism to seal the tomb.
Nellifer goes into hysterics when told the tomb is being sealed, realizing she is trapped.
"There's no way out," Hamar tells her, adding: ""This" is what you lied and schemed and murdered to achieve.
This is your kingdom.
"Hamar, deeming the tomb truly robber-proof, releases Vashtar and Senta from their death sentence, allowing them to leave Egypt and return to their homeland with their people. 
Several boat pits were found in Ancient Egyptian sites. 
The first contact between the two people dates back nearly seven thousand years ago when the ancient Egyptians launched their earliest recorded expedition to the Land of Punt under Sahure of the Fifth Dynasty although Punt gold dates back to even earlier times during the rule of King Khufu of the Fourth Dynasty.
Ancient Egyptians called this place "Ta-neter" (The Gods' Land) and viewed it as a mysterious and unknown land of great fortune.
They frequently engaged in trade expeditions with their partners in Punt where they acquired gold, incense, ebony, ivory, slaves, exotic animals and skins. 
 in Arabic traditions.
In 642 A.C. the Arabs conquered Egypt.
When arriving the Giza pyramids, they searched for explanations as who could have built these monuments.
At the arabian times, no inhabitant of Egypt was able to tell and no one could translate the Egyptian hieroglyphs anymore.
As a consequence, the arabian historians wrote down their own theories and stories.
The best known story about Khufu and his pyramid can be found in the book "Hitat" (completely: "al-Mawāʿiẓ wa-’l-iʿtibār fī ḏikr al-ḫiṭaṭ wa-’l-ʾāṯār"), written in 1430 by Muhammad al-Maqrizi (1364-1442).
This book containes several, collected theories and myths about Khufu and especially about the Great Pyramid.
Though, king Khufu himself is seldomly mentioned, as good as all arab writers are convinced, that the Great Pyramid (and the others, too) were built by the god Hermes (named "Idris" by the Arabs).
Al-Maqrizi notes, that Khufu was named "Saurid", "Salhuk" and/or "Sarjak" by the biblical Amalekites.
Then he writes, that Khufu built the pyramids after repeating nightmares, in which the earth turned upside-down, the stars fell down and peoples were screaming in terror.
Another nightmare showed the stars falling down from heaven and kidnapping humans, then putting these beneath two large mountains.
King Khufu then received a warning by his prophets about a devastating deluge, that would come and destroy Egypt.
To protect his treasures and books of wisdom, Khufu built the three pyramids of Giza.
Modern Egyptologists and Historians call for caution about the credibility of the arabian stories.
They point out, that the ancient Arabs were guided by their strict religious believe, that only one god exists and therefor no other god were allowed to be mentioned.
As a consequence, they transferred Egyptian kings and gods into biblical prophets and kings.
The Egyptian god Thot, named "Hermes" by the Greeks, for example, was named after the prophet Henoch.
King Khufu, as already mentioned, was named "Saurid", "Salhuk" and/or "Sarjak" and often relaced in other stories by a prophet named "Šaddād bīn 'Âd".
Furthermore, scholars point to several contradictions which can be found in Al-Maqrizis book.
For example, in the first chapter of the Hitat the Copts are said to have denied any intruding of the Amalekites in Egypt and the pyramids were erected as the tomb of Šaddād bīn 'Âd.
But some chapters later, Al-Maqrizi claims that the Copts call Saurid the builder of the pyramids. 
Fictional character biographies.
Carter Hall.
In the days of ancient Egypt, Prince Khufu is engaged in a feud with his rival, the Egyptian priest Hath-Set.
The priest eventually captures both Khufu and his consort Chay-Ara, and kills them using a cursed dagger of Nth metal.
Millennia later, in 1940, Khufu is reincarnated as American archaeologist Carter Hall, Chay-Ara as Shiera Saunders, and Hath-Set as scientist Anton Hastor.
After touching the same Nth Metal dagger used to kill Khufu, Carter regains the memories of his former life and realizes Hastor is the reincarnation of his ancient foe.
When Hastor kidnaps Shiera, using a magic spell to draw her to his lair, Hall uses his newly-refound memories to craft a gravity-defying belt using Nth metal and a winged costume to become Hawkman.
Carter successfully rescues Shiera, Anton is killed by electrocution, and the two begin a relationship.
Carter Hall and Shiera Saunders had a son together, named Hector Hall, who grew up to also have a superheroic identity as Silver Scarab and later adopted the mantle of Dr.
Fate.
Hector Hall was a member of the superhero groups Infinity Inc. and the JSA where he served alongside his father.
The incarnation of Hawkman that first appeared in the 2011 DC Universe relaunch, The New 52 identifies himself as Carter Hall.