Original sentence: In a hadith widely regarded as authentic, Muhammad said,.On the other hand it is found in Sunan Abi Dawud, Ibn Majah and Tirmidhi and "some non-Shiite Muslims believe that the Mahdi will come in addition to the Second Coming of Jesus
Edited sentence: "  In actual Sunni belief, Imam Mahdi (Peace be on him) will come, and Isa (Peace be on him) (Jesus) will come at the end times.According to Sunnis, any rejection of Imam Mahdi (Peace be on him) is in fact based on a gross misunderstanding of traditional and mainstream, Sunni belief.Although the notion that it is not Sunni belief is not based on any proof among Sunnis.Among many hadiths, a hadith widely regarded as authentic,  Muhammad said,.Anybody who does not know that belief in Imam Mahdi is a necessary Sunni belief, does not actually know Sunni beliefs.Imam Mahdi (Peace be on him) is a mandatory part of Sunni (Ahula Sunna wal Jamah) belief and is definately connected with the time Isa (Peace be on him)(Jesus) will descend, which is all connected to the start of the last days.In actuality these sources are full of inaccuracies, when referring to what Sunnis actually believe.Some of this proof is found in Sunan Abi Dawud, Ibn Majah and Tirmidhi and "some non-Shiite Muslims believe that the Mahdi will come in addition to the Second Coming of Jesus.There are numerous hadith references and sources confirming the belief of Imam Mahdi (Peace be on him); it is a mandatory and essential belief for Sunnis