Riyad as-Salihin, Book 16, Hadith 1425 (In-Book) ⓘ
'Aishah (May Allah be pleased with her) reported: The Prophet used to recite frequently in his bowing and prostration: "Subhanak- Allahumma, Rabbana wa bihamdika. Allahum-maghfir li (O Allah! You are free from imperfection and I begin with praising You. Forgive my sins)."[Al-Bukhari and Muslim].
وعن عائشة رضي الله عنه قالت: كان النبي صلى الله عليه وسلم يكثر أن يقول في ركوعه وسجوده: سبحانك اللهم ربنا وبحمدك، اللهم اغفر لي" ((متفق عليه)).