question #3 Sahih Muslim 730b, Book 6, Hadith 130 : What can be learned about the flexibility in prayer postures from the Prophet’s practice during night prayers?

‘A’isha reported that the Messenger of Allah (ﷺ) would pray in the night for a long time, and when he prayed standing be bowed in a standing posture, and when he prayed sitting, he bowed in a sitting posture.