Al-Husayn ibn Said narrated from al-Nadr, from Hisham, from Sulayman ibn Khalid, who said: I asked Aba Abdillah عليه السلام, peace be upon him, about a man who is leading the people in prayer, then becomes invalidated (enters a state of hadath), and he appoints a man who had missed a rak’ah what should he do? Imam عليه السلام said: “He should not appoint a man who had missed a rak’ah, but rather he should take the hand of someone else and appoint him.”