Mukhtasar Bukhari

´Sayyiduna Abu Sa‘id (may Allah be pleased with him) says that` I heard the Prophet Muhammad (peace and blessings be upon him) say: “(On the Day of Resurrection) our Lord will uncover His shin, and all believing men and women will prostrate. But those who used to pray in the world to show off to people and to be heard by them, they will also try to prostrate, but their backs will become stiff like a board (they will not be able to bend and will not be able to prostrate).”