It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "When any of you leads the prayer, he should make it light, because there are sick, weak, and elderly people in the congregation. And when he prays alone, he may prolong it as much as he wishes."

It is narrated from Hazrat Nafi that I stood in prayer with Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), and there was no one else besides me. So Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) took hold of me from behind and made me stand equal to him on his right side.

It is narrated from Yahya bin Saeed that a man used to lead the people in prayer at Aqeeq (a place in Madinah), so Umar bin Abdul Aziz, may Allah have mercy on him, sent word to prevent him from leading the prayer.

Imam Malik, may Allah have mercy on him, said: He was prevented from leading the prayer because his father was not known.