"A cousin of mine and I arrived as guests of Messenger of Allah. He said to us: 'When you travel then call the Adhan and Iqamah and let the eldest of you lead the prayer.'"  

قَدِمْتُ عَلَى رَسُولِ اللَّهِ ﷺ أَنَا وَابْنُ عَمٍّ لِي فَقَالَ لَنَا إِذَا سَافَرْتُمَا فَأَذِّنَا وَأَقِيمَا وَلْيَؤُمَّكُمَا أَكْبَرُكُمَا