´It was narrated hat Aishah said:` "The Messenger of Allah (ﷺ) used to pray standing and sitting. If he started to pray standing, he would bow standing and if he started to pray sitting, he would bow sitting."
Hadith Referenceسنن نسائي / كتاب قيام الليل وتطوع النهار / 1648
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم