Musannaf Ibn Abi Shaybah 2137 — How the adhan and iqamah are performed

Abd al-Rahman bin Abi Layla says: The Companions of the Messenger of Allah (peace and blessings be upon him) narrated to us that Sayyiduna Abdullah bin Zayd al-Ansari (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) and said: O Messenger of Allah, I saw in a dream as if a man wearing two green cloaks stood on a remnant of a wall, gave the adhan in pairs, gave the iqamah in pairs, and sat for a short while. He said: Sayyiduna Bilal (may Allah be pleased with him) heard this, so he stood up, gave the adhan in pairs, gave the iqamah in pairs, and sat for a short while.