Mukhtasar Bukhari (Abridged) 589 — If a patient starts prayer sitting

Umm al-Mu'mineen Aisha Siddiqa (may Allah be pleased with her) says in a narration that he used to do the same in the second rak'ah as well. Then when the Prophet (peace be upon him) completed the prayer, he would see: if I was awake, he would talk with me, and if I was asleep, the Prophet (peace be upon him) would remain lying down.