Thauban reported God’s messenger as saying that if any Muslim says three times evening and morning, "I am pleased with God as Lord, with Islam as religion, and with Muhammad as Prophet," God will certainly please him on the day of resurrection.
Anas reported God's messenger as saying that if anyone says in the morning, “O God, in the morning we call Thee, the bearers of Thy Throne, Thy angels and all Thy creatures to witness that Thou art God than whom alone there is no god, being without a partner, and that Muhammad is Thy servant and messenger,” God will forgive him any sins he commits that day; and if he says it in the evening, God will forgive him any sins he commits that night.
Tirmidhi and Abu Dawud transmitted it, Tirmidhi saying this is a gharib tradition.
Hudhaifa said that when the Prophet wanted to go to sleep he placed his hand under his head and said, "O God, guard me from thy punishment on the day when Thou gatherest Thy servants," or "raisest up Thy servants."
Tirmidhi transmitted it, and Ahmad gave al-Bara’ as his authority.
Ibn ‘Umar said that God’s messenger never failed to use these words evening and morning, “O God, I ask Thee for security in this world and the next; O God, I ask Thee for forgiveness and security in my religion and my worldly affairs, in my family and my property; O God, conceal my faults and keep me safe from the things which I fear; O God, guard me in front of me and behind me, on my right hand and on my left, and from above me; and I seek refuge in Thy greatness from receiving unexpected harm from below me.” Waki‘ said he meant being swallowed up by the earth.
