This was narrated by Ahmad ibn Muhammad ibn Isa from Muhammad ibn Ismail ibn Buzay, who said: I wrote to Abu al-Hasan عليه السلام, peace be upon him, saying: “I attend the mosques with my neighbors and others, and they ask me to lead them in prayer, while I have already prayed before coming to them. Sometimes those who follow my prayer include those who imitate my actions in prayer, the weak, and the ignorant, and I dislike to step forward (as imam of prayer) having already prayed, due to the state of those who follow me in prayer from among those I have mentioned to you. So command me in this matter with your instruction, that I may follow it and act upon it, if Allah سبحانه وتعالى wills.” So Imam عليه السلام wrote back: “Pray with them.”