Abu Huraira told of hearing God’s Messenger say,“The first of his deeds for which a man will be taken into account on the day of resurrection will be his prayer. If it is sound he will be saved and successful, but if it is unsound he will be unfortunate and miserable. If any deficiency is found in his obligatory prayer the Lord who is blessed and exalted will issue instructions to consider whether His servant has said any voluntary prayers so that what is lacking in the obligatory prayer may be made up by it. Then the rest of his actions will be treated in the same fashion.”In a version it says,“Then zakat will be dealt with like that, and all his actions will be treated on the same principle.”Abu Dawud transmitted it.