Fighting for the Cause of Allah (Jihaad)
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 ".Narrated Malik bin Al-Huwairith:On my departure from the Prophet (ﷺ) 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
From Sahih al-Bukhari, whose reports the scholars accept as authentic.