Volume 2, Book 20, Number 216:
Narrated ‘Imran bin Husain:
(who had piles) I asked Allah’s Apostle about the praying of a man while sitting. He said, “If he
prays while standing it is better and he who prays while sitting gets half the reward of that who
prays standing; and whoever prays while Lying gets half the reward of that who prays while sitting.”