Simplify the following text for a Grade 10 native English-speaking person.
Original: In Jewish lore , Samael is said to be the angel of death , the chief ruler of the Fifth Heaven and one of the seven regents of the world served by two million angels ; he resides in the Seventh Heaven .
Simplified: In Jewish beliefs , Sammael is said to be the Angel of Death , the ruler of the Fifth Heaven , and one of the seven regents of the world served by two million angels ; he resides in the Seventh Heaven .