Jami' at-Tirmidhi — Hadith #27753

Abu Ammar narrated to us, Waki’ narrated to us, on the authority of Al-A’mash, on the authority of Abu Salih, on the authority of Abu Hurairah, he said: The Messenger of God, may God’s prayers and peace be upon him, said: “Three no God will speak to them on the Day of Resurrection but will not purify them, and for them is a painful punishment. A man has pledged allegiance to an imam, and if he gives it to him, he will fulfill it, but if he does not give it to him, he will not. “It will be good for him.” Abu Issa said, “This is a good and authentic hadith, and there is no difference in that matter.”