وَعَن مَالك بن الْحُوَيْرِث
قَالَ: أَتَيْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَا وَابْنُ عَمٍّ لِي فَقَالَ: «إِذَا سَافَرْتُمَا فأذنا وأقيما وليؤمكما أكبركما»
He and a cousin of his came to the Prophet (sallallahu alayhi wa sallam), who said, “When you two are on a journey, you should call the adhan and repeat the iqama, then the older of you should act as imam.” This is how.
Mishkat al-Masabih 636, Book 5, Prayer, Hadith 114. 1 min read