Sunan Ibn Majah 1231
سنن ابن ماجه#1231SahihIt was narrated from ‘Imran bin Husain that he asked the Messenger of Allah (ﷺ) about a man who prays sitting down. He said, “Whoever performs prayer standing up, that is better. Whoever performs prayer sitting down will have half the reward of one who prays standing. And whoever performs prayer lying down will have half the reward of one who prays sitting.”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautHasan Sahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 5:429