´It was narrated that ‘Abdullah bin Shaqiq Al-‘Uqaili said:` “I asked ‘Aishah about the prayer of the Messenger of Allah (ﷺ) at night. She said: ‘He used to pray for a long time at night standing up, and for a long time at night sitting down. If he prayed standing, he would bow standing, and if he prayed sitting, he would bow sitting.’”
Related hadith on this topic
Explanation & Benefits
Shaykh Umar Farooq Saeedi
955. Commentary:
The best practice is that when the recitation (qira’ah) is performed standing, then the bowing (ruku‘) should also be performed standing; and if the recitation is performed sitting, then the bowing should also be performed sitting... This, and the aforementioned scenario—i.e., if a portion of the rak‘ah is performed standing and a portion sitting—is also permissible.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 955