Jami' at-Tirmidhi — Hadith #29057

Al-Abbas bin Muhammad Al-Duri narrated to us, he said, Khalid bin Mukhlid narrated to us, he said, Sulayman bin Bilal narrated to us, he said, Suhail bin Abi Saleh narrated to us, On the authority of his father, on the authority of Abu Hurairah, he said: The Messenger of God, may God bless him and grant him peace, said, “Say, ‘He is God, One.’” is equivalent to a third of the Qur’an. This is a good and authentic hadith