It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Holy Prophet (peace and blessings be upon him) said to me, "O Abu Huraira (may Allah be pleased with him), shall I not teach you a word which is a treasure of Paradise and has come from beneath the Throne?" I said, "Certainly, may my parents be sacrificed for you." The Holy Prophet (peace and blessings be upon him) said, "Say: La hawla wa la quwwata illa billah." Upon hearing this, Allah says, "My servant has submitted and entrusted himself."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 8426
Hadith Gradingحکم دارالسلام:صحيح دون قوله: «تحت العرش» وهذا إسناد حسن