Narrated `Abdullah bin Buraida:
`Imran bin Husain had piles. Once Abu Ma mar narrated from `Imran bin Husain had said, "I asked the Prophet (p.b.u.h) 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.' "
Narrated `Imran bin Husain:
(who had piles) I asked Allah's Messenger (ﷺ) 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."
Narrated `Aisha:
I did not see the Prophet (ﷺ) reciting (the Qur'an) in the night prayer while sitting except when he became old; when he used to recite while sitting, and when thirty or forty verses remained from the Sura, he would get up and recite them and then bow.
Narrated Hudhaifa:
Whenever the Prophet (ﷺ) got up for Tahajjud prayer he used to clean his mouth (and teeth) with Siwak.