Sahih al-Bukhari, Hadith 2848 ⓘ
Narrated Malik bin Al-Huwairith: On my departure from the Prophet he said to me and to a friend of mine, "You two, pronounce the Adhan and the Iqama for the prayer and let the elder of you lead the prayer."
حَدَّثَنَا أَحْمَدُ بْنُ يُونُسَ، حَدَّثَنَا أَبُو شِهَابٍ، عَنْ خَالِدٍ الْحَذَّاءِ، عَنْ أَبِي قِلاَبَةَ، عَنْ مَالِكِ بْنِ الْحُوَيْرِثِ، قَالَ انْصَرَفْتُ مِنْ عِنْدِ النَّبِيِّ صلى الله عليه وسلم، فَقَالَ لَنَا أَنَا وَصَاحِبٌ لِي " أَذِّنَا وَأَقِيمَا، وَلْيَؤُمَّكُمَا أَكْبَرُكُمَا " .
also referenced under: Book 56, Hadith 64 (In-Book) & Volume 4, Book 52, Hadith 101 (USC-MSA)