Hazrat Asma bint Yazid narrates that the Messenger of Allah, peace and blessings be upon him, said: The Greatest Name of Allah is mentioned in these two verses: "And your God is one God; there is no deity except Him, the Most Merciful, the Most Compassionate." And at the beginning of Surah Al-Imran: Alif Lam Meem. Allah, there is no deity except Him, the Ever-Living, the Sustainer of all existence."