Hadith 1684
Isa bin Talha narrates: We were with Sayyiduna Muawiyah (may Allah be pleased with him). He heard the muezzin say «اللہ اکبر» «الله اکبر», so Sayyiduna Muawiyah (may Allah be pleased with him) also said «اللہ اکبر» «اللہ اکبر». When the muezzin said «اشهد ان لا اله الا الله», Sayyiduna Muawiyah (may Allah be pleased with him) said: I also bear witness to this. When the muezzin said «اشهد ان محمدا رسول الله», Sayyiduna Muawiyah (may Allah be pleased with him) said: I also bear witness to this. Then Sayyiduna Muawiyah (may Allah be pleased with him) explained: I heard the Noble Prophet (peace and blessings be upon him) responding to the adhan in this manner.