Sahih al-Bukhari 1116
صحيح البخاري#1116SahihNarrated `Abdullah bin Buraida:`Imran bin Husain had piles. Once Abu Ma mar narrated from `Imran bin Husain had said, "I asked the Prophet (ﷺ) about the prayer of a person while sitting. He said, 'It is better for one to pray standing; and whoever prays sitting gets half the reward of that who prays while standing; and whoever prays while Lying gets half the reward of that who prays while sitting
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 18:36