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.'" (DE)
English reference (DE): Vol. 5, Book 44, Hadith 3347 (DE)
Arabic reference (DE): Book 47, Hadith 3670 (DE)