The Messenger of Allah ﷺ used to say during his bowing and prostration, "Glorious, Holy, Lord of the angels and the Spirit."
حدثنا عمرو بن الهيثم قال حدثنا هشام عن قتادة عن مطرف
أن رسول الله ﷺ كان يقول في ركوعه وسجوده سبوح قدوس رب الملائكة والروح
Its isnad is sahih. Amr bin Haytham is Abu Qatan, and he is trustworthy. His hadith is found in the collections of all six except Bukhari. The hadith was narrated in similar wording by Muslim, 1/353, no. 487, and Abu Dawud, 1/230, no. 872, both in the chapter on prayer, and by Nasai, 2/190, no. 1048, and 2/244, no. 1134, in the chapter on tatbiq.