Abu Sulaiman reported:

Abu Sulaiman reported: We came to the Prophet, peace be upon him, while we were young men and we stayed with him twenty nights. Then he thought that we were anxious for our families, so he asked us who we had left behind to look after our families and we told him. He was kindhearted and merciful, so he said, “Return to your families, teach them and enjoin good upon them; offer your prayers in the way you say me performing prayers; and when the fixed time of prayer arrives, then one of you should announce the call to prayer and the oldest of you should lead the prayer.”

[Sahih Bukhari, Book 73, Number 37]

عَنْ أَبِي سُلَيْمَانَ مَالِكِ بْنِ الْحُوَيْرِثِ قَالَ أَتَيْنَا النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَنَحْنُ شَبَبَةٌ مُتَقَارِبُونَ فَأَقَمْنَا عِنْدَهُ عِشْرِينَ لَيْلَةً فَظَنَّ أَنَّا اشْتَقْنَا أَهْلَنَا وَسَأَلَنَا عَمَّنْ تَرَكْنَا فِي أَهْلِنَا فَأَخْبَرْنَاهُ وَكَانَ رَفِيقًا رَحِيمًا فَقَالَارْجِعُوا إِلَى أَهْلِيكُمْ فَعَلِّمُوهُمْ وَمُرُوهُمْ وَصَلُّوا كَمَا رَأَيْتُمُونِي أُصَلِّي وَإِذَا حَضَرَتْ الصَّلَاةُ فَلْيُؤَذِّنْ لَكُمْ أَحَدُكُمْ ثُمَّ لِيَؤُمَّكُمْ أَكْبَرُكُمْ

5662 صحيح البخاري كِتَاب الْأَدَبِ بَاب رَحْمَةِ النَّاسِ وَالْبَهَائِمِ