Silsilat al-Ahadith al-Sahihah

Sayyiduna Jabir (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) passed by a man who was standing on a rock performing prayer. The Prophet (peace and blessings be upon him) went to one side of Makkah, stayed there for a while, and then returned. He found that man still praying in the same state. The Prophet (peace and blessings be upon him) brought his two hands together and said: "O people! Adopt moderation, for Allah does not tire until you tire."