ibn Abbas · The Book of Leading the Prayer (Al-Imamah)

"I prayed beside the Prophet (ﷺ) and Ayesha was behind us praying with us, and I was beside the Prophet (ﷺ) praying with him."

"The Messenger of Allah (ﷺ)said: 'If there are three people, let one of them lead the others in prayer, and the one who has the most right to lead the prayer is the one who recites (knows) the most (Qur'an)."'

"A man came while the Messenger of Allah (ﷺ) was praying Subh, and he prayed two Rak'ahs then joined the prayer. When the Messenger of Allah (ﷺ) had finished praying he said: O so-and-so, which of them is your prayer - the one you prayed with us or the one you prayed on your own?"'