Hadith 411
It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him), he says that the Messenger of Allah (peace and blessings of Allah be upon him) said: "When you hear the mu'adhdhin (calling the adhan), then say as he says."
Hadith 412
It is narrated from Sayyidah Umm Habibah bint Sufyan (may Allah be pleased with her), she says that when the Messenger of Allah (peace and blessings be upon him) was present in her house on her turn and heard the muezzin giving the adhan, he would say just as the muezzin said until he (the muezzin) finished (the adhan).
Hadith 413
It is narrated from Sayyidah Umm Habibah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) used to say (the words) just as the muezzin said, until the muezzin would finish (the adhan and) become silent.