once
يَقُولُ مِثْلَ مَا يَقُولُ المُؤَذِّنُ إِلاَّ فِي ((حَيَّ عَلَى الصَّلَاةِ وَحَيَّ عَلَى الْفَلَاحِ)) فَيقُولُ: ((لاَ حَوْلَ وَلاَ قُوَّةَ إِلاَّ بِاللَّهِ)).
Meaning
One repeats just as the mu-aththin (one who calls to prayer) says, except when he says: Hayya AAalas-salah (or) hayya AAalal-falah ‘come to prayer, come to success’ instead, one should say: La hawla wala quwwata illa billah. ‘There is no might nor power except with Allah.
Source and references
Hisn al-Muslim, entry 22.The reference is copied from the edition; separate editorial verification is not complete yet.
Source edition: Fortress of the Muslim. Open source ↗