Musannaf Ibn Abi Shaybah 39189 — The imam speaking during the sermon

It is narrated from Sayyiduna Abdullah bin Zayd (may Allah be pleased with him), who was a Companion of the Messenger (peace and blessings be upon him), that he saw the Prophet (peace and blessings be upon him) on the day he went out to pray for rain. He turned his back to the people, faced the Qiblah and supplicated. Then he turned his cloak over, then he led two rak'ahs of prayer, reciting in those rak'ahs and reciting aloud. It is mentioned that the view of (Imam) Abu Hanifah is: The rain prayer will not be prayed in congregation, and no sermon will be delivered in it.