Sunan Ibn Majah, 1227

Rapporté par ‘Aishah رضي الله عنها : Je n’ai jamais vu le Messager d’Allah (ﷺ) accomplir la prière de la nuit autrement qu’en étant debout, jusqu’à ce qu’il devienne âgé. Ensuite, il a commencé à prier assis, et quand il ne lui restait plus que trente ou quarante versets à réciter, il se levait, les récitait debout, puis se prosternait

It was narrated that ‘Aishah said:“I did not see the Messenger of Allah (ﷺ) offer any of the night prayers in any way other than standing, until he became old. Then he started to pray sitting down until, when there were thirty or forty Verses left of his recitation, he would stand up and recite them, and prostrate.”