It is narrated from Hazrat Abu Rafi’ (may Allah be pleased with him) that when the Noble Prophet (peace and blessings be upon him) would hear the voice of the muezzin, he would repeat the same phrases that he was saying, but when he reached "Hayya ‘ala-s-Salah" and "Hayya ‘ala-l-Falah," the Noble Prophet (peace and blessings be upon him) would say: "La hawla wa la quwwata illa billah."