Sahih al-Bukhari — Fighting for the Cause of Allah (Jihaad) — Hadith No: 2848
Translation
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