Sunan At-Tirmidhi

Ismail bin Umayyah said:“I heard a Bedouin man saying: ‘I heard Abu Hurairah saying: “Whoever recited Surat ‘By At-Tim and Az-Zamzam’ Then he recited: ‘Is not Allah the best of judges?’ then let him say: ‘Of course, and I am a witness to that.’”