Abu Zaynab narrates: I heard Sayyiduna Abu Dharr (may Allah be pleased with him) say: The Messenger of Allah (peace and blessings be upon him) said to me: "O Abu Dharr, shall I not tell you of a word from the treasures of Paradise?" I said: Yes, may my father and mother be sacrificed for you. He said: "Say: La hawla wa la quwwata illa billah (There is no might and no power except with Allah)."
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 1629