Sunan an-Nasa'i #634 · The Book of the Adhan (The Call to Prayer)

Sunan an-Nasa'iIt was narrated that Malik bin Al-Huwairith said
Sunan an-Nasa'i · Book 7 · The Book of the Adhan (The Call to Prayer)
Sunan an-Nasa'i · كتاب 7 · كتاب الأذان
"I came to the Prophet (S.A.W) with a cousin of mine" - on an another occasion he said: "with a companion of mine" - "and he said: 'When the two of you travel, call the Adhan and the Iqamah, and let the older of you lead the prayer
أَخْبَرَنَا حَاجِبُ بْنُ سُلَيْمَانَ، عَنْ وَكِيعٍ، عَنْ سُفْيَانَ، عَنْ خَالِدٍ الْحَذَّاءِ، عَنْ أَبِي قِلاَبَةَ، عَنْ مَالِكِ بْنِ الْحُوَيْرِثِ، قَالَ أَتَيْتُ النَّبِيَّ صلى الله عليه وسلم أَنَا وَابْنُ عَمٍّ لِي وَقَالَ مَرَّةً أُخْرَى أَنَا وَصَاحِبٌ لِي فَقَالَ ‏
"‏ إِذَا سَافَرْتُمَا فَأَذِّنَا وَأَقِيمَا وَلْيَؤُمَّكُمَا أَكْبَرُكُمَا ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 634In-book reference : Book 7, Hadith 9