Hadith on Salat: The Prophet’s supplication in bowing, prostrating

Aisha reported: The Messenger of Allah, peace and blessings be upon him, would say in his bowing and prostrating, “He is glorified and holy, the Lord of the angels and the spirit.”

Source: Ṣaḥīḥ Muslim 487

Grade: Sahih (authentic) according to Muslim

عن عائشة أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَقُولُ فِي رُكُوعِهِ وَسُجُودِهِ سُبُّوحٌ قُدُّوسٌ رَبُّ الْمَلَائِكَةِ وَالرُّوحِ

487 صحيح مسلم كتاب الصلاة باب ما يقال في الركوع والسجود