Jabir ibn Abd-Allah wrote in a hadith that Muhammad, said: “The best remembrance of God is to repeat La ilaha ilallah and the best prayer (du’a) is Alhamdulillah (all praise belongs to God).” (Narrated by Nasa’i, Ibn Majah, and Hakim who declared its chain ‘sound’.)

Abu Huraira wrote that Muhammad said: “Any matter of importance which is not begun with Alhumdulillah remains defective.” From Abu Dawood

Anas bin Malik wrote that Muhammad said: “God is pleased with his slave who says, ‘Alhumdulillah’ when he takes a morsel of food and drinks a draught of water.”