During Athan

During Athan – 1 

لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللهِ

La Hawla wa La Quwwata Illa Billah

(Repeat what the Mu’aththin says, except for when he says:حَيَّ عَلَى الصَّلاَةِ وَحَيَّ عَلَى الْفَلَاحِ Here you should says: “There is no might and no power except by Allah.”)
[مسلم 1:288]