“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.’”
Sunan Ibn Majah Book 5, Hadith 426