‘Abdallah b. ‘Umar told that the Prophet used to say, “Everything has a polish, and the polish for hearts is rememberance of God. Nothing is more calculated to resuce from God’s punishment than remembrance of God.” He was asked whether this did not apply also to jihad in God’s path, and said, “Not even if one should ply his sword till it is broken.”
Abu Huraira reported God’s messenger as saying, “God had ninety-nine names, one short of a hundered. He who retains them in his memory* will enter paradise.” A version has, “And He is One. He loves what is single.”
*The Arabic is ahsaha, a word which has different meanings. Besides the meaning above can mean to number, to reach the last number, to understand, to attain comprehensive knowledge.