"Some of my companions told me that Hisham had said, "When the Mu'adh-dhin said, "Haiyi ʿalassala (come for the prayer)." Muawiya said, "La hawla wala quwata illa billah (There is neither might nor any power except with Allah)" and added, "We heard your Prophet saying the same."
لاَ حَوْلَ وَلاَ قُوَّةَ إِلاَّ بِاللَّهِ وَقَالَ هَكَذَا سَمِعْنَا نَبِيَّكُمْ ﷺ يَقُولُ