مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 871
Prayer
Bowing - Section 1
وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُكْثِرُ أَنْ يَقُولَ فِي رُكُوعِهِ وَسُجُودِهِ: «سُبْحَانَكَ اللَّهُمَّ رَبَّنَا وَبِحَمْدِكَ اللَّهُمَّ اغْفِرْ لِي» يَتَأَوَّلُ الْقُرْآن
‘A’isha told how the Prophet (ﷺ) often said while bowing and prostrating himself, “Glory be to You, O God, our Lord, and praise be to You. O God, forgive me," thus complying with the [command in] the Qur’an (Al-Qur’an; 110-3). (Bukhari and Muslim.)
Mishkat al-Masabih, 871مُتَّفَقٌ عَلَيْهِ (الألباني)