قَالَ: فَأَتَيْنَا النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَأَقَمْنَا عِنْدَهُ، فَقَالَ: لَوْ رَجَعْتُمْ إِلَى أَهْلِيكُمْ صَلُّوا صَلَاةَ كَذَا، فِي حِينِ كَذَا صَلُّوا صَلَاةَ كَذَا، فِي حِينِ كَذَا فَإِذَا حَضَرَتِ الصَّلَاةُ فَلْيُؤَذِّنْ أَحَدُكُمْ وَلْيَؤُمَّكُمْ أَكْبَرُكُمْ".
صحیح بخاری · Hadith 819
We came to the Prophet (after embracing Islam) and stayed with him. He said to us, 'When you go back to your families, pray such and such a prayer at such and such a time, pray such and such a prayer at such and such a time, and when there is the time for the prayer then only of you should pronounce the Adhan for the prayer and the oldest of you should lead the prayer."