Mukhtasar Muslim

Sayyiduna Anas (may Allah be pleased with him) says that one day the Messenger of Allah (peace and blessings be upon him) led us in prayer. When he finished the prayer, he turned towards us and said, "O people! I am your imam, so do not precede me in bowing, prostrating, standing, or in saying salam. I see you from in front and behind. By the One in whose hand is my soul, if you were to see what I see, you would laugh little and weep much." The people asked, "O Messenger of Allah! What have you seen?" He replied, "I have seen Paradise and Hell."