Repeat after Mu’adhdhin when pronouncing Adhan

Abu Sa`id Al-Khudri (رضي الله عنه) ذكرت:

رسول الله (عليه الصلاة والسلام) قال,

“When you hear the Mu’adhdhin (pronouncing the call to Salah), repeat after him what he says.”

[رواه البخاري ومسلم]

Commentary:
This Hadith also tells us to repeat the words of Adhan when we hear it. But when he says “Hayya `alas-Salah” أو “Hayya `alal-Falah” we must say “La hawla wa la quwwata illa billah.”

[Riyad-us-Saliheen – Hadith No.1038]