´Ibn Mas'ud narrated that :` the Prophet said: "When one of you bows then says while he is bowing: (Subhana Rabbiyal Azim) 'Glorious is my Lord the Magnificent' three times, then he has completed his bowing. And that is the least of it. And when he prostrates and says while prostrating: (Subhana Rabbiyal A'la) 'Glorious is my Lord the Most High' three times, then he has completed his prostrations, and that is the least of it.'"
Hadith Referenceسنن ترمذي / كتاب الصلاة / 261
Hadith Gradingالألبانی:ضعيف، ابن ماجة (890) // ضعيف سنن ابن ماجة (187) ، المشكاة (880) ، ضعيف الجامع الصغير (525) ، ضعيف أبي داود (187 / 886) // | زبیر علی زئی:إسناده ضعيف / د 886 ، جه 89
Hadith Takhrij«سنن ابی داود/ الصلاة 154 (886) ، سنن ابن ماجہ/الإقامة 20 (888) ، ( تحفة الأشراف : 9530) (ضعیف) (عون کا سماع ابن مسعود رضی الله عنہ سے نہیں ہے، جیسا کہ مولف نے خود بیان کر دیا ہے)»
´Hudhaifah narrated that :` he performed Salat with the Prophet, and that while he was bowing he would say: (Subhana Rabbiyal Azim); "Glorious is my Lord the Magnificent" and while prostrating: (Subhana Rabbiyal A'la) 'Glorious is my Lord the Most High.' And he would not recite an Ayah mentioning mercy, except that he would stop and ask (for mercy), and he would not recite an Ayah mentioning punishment, except that he would stop and seek refuge (with Allah from it).
´(Another similar narration) This Hadith has been narrated from Hudhaifah :` from another route: "That he performed Salat during the night with the Prophet" and he mentioned the Hadith.