Asma’ daughter of Yazid reported the Prophet as saying, “God’s greatest name is in these two verses, ‘And your God is one God; there is no god but He, the Compassionate, the Merciful’ ”
Tirmidhi, Abu Dawud, Ibn Majah and Darimi transmitted it.
Anas said that when he was sitting with the Prophet in the mosque a man who was praying said, “O God, I ask Thee by virtue of the fact that praise is due to Thee than whom there is no god, who showest favour and beneficence, the Originator of the heavens and the earth, O Lord of Majesty and Splendour, O Living One; O Eternal One, I ask of Thee.” The Prophet then said, “He has supplicated God using His greatest name, when supplicated by which He answers and when asked by which He gives.”
Tirmidhi, Abu Dawud, Nasa’i and Ibn Majah transmitted it.
Narrated Sa'd reported God’s messenger as saying that no Muslim will supplicate God for anything and fail to receive an answer when he uses Dhun Nun’s supplication when he was in the belly of the fish:
“There is no god but Thee to whom be the glory. I was indeed a wrongdoer.”
Buraida told that God’s messenger heard a man saying, “O God I ask Thee by virtue of Thy being God than whom there is no god, the One, He to whom men repair, who has not begotten and has not been begotten, and to whom no one is equal,” and said, “He has supplicated God using His greatest name, when asked by which He gives and when supplicated by which He answers.”
