Sayyida Asma bint Yazid (may Allah be pleased with her) narrated from the Messenger of Allah (peace and blessings be upon him), he said: "The Greatest Name of Allah is in these two verses «وإلهكم إله واحد لا إله إلا هو الرحمن الرحيم» and in the beginning verse of Surah Al-Imran."

Abdullah bin Buraidah narrated: Buraidah (may Allah be pleased with him) went out at the time of ‘Isha and met the Messenger of Allah (peace and blessings be upon him). The Prophet (peace and blessings be upon him) took his hand and brought him into the mosque, where a man was supplicating with these words:“O Allah! I ask You, I bear witness that You are Allah, the One, the Only, the Self-Sufficient, Who neither begets nor is begotten, and there is none equal to Him.”The Messenger of Allah (peace and blessings be upon him) said:“By Him in Whose hand is my soul! He has supplicated to Allah with His Greatest Name; when He is supplicated with it, He responds, and when He is asked with it, He gives.”