Sulama daughter of al-Hurr reported God’s Messenger as saying, "One of the signs of the last hour will be that people in a mosque will refuse to act as imam and will not find an imam to lead them in prayer.”
Narrated Ibn ‘Umar reported God’s Messenger as saying, "There are three people whose prayer is not accepted:
one who goes in front of people when they do not like him, a man who comes to prayer dibaran, which means that he comes to it too late, and a man who takes into slavery an emancipated female slave.”
Abu Huraira reported God’s Messenger as saying, “Jihad is a necessary duty for you along with any commander, pious or impious, even if he commits heinous sins; prayer is a necessary duty for you behind any Muslim, pious or impious, even if he commits heinous sins; and prayer is a necessary duty for every Muslim, pious or impious, even if he commits heinous sins.”