Musnad Ahmad 33:1113

Husayn narrated to us, Ibn Abi Dhi’b narrated to us, from a man of Banu Salamah, from Jabir ibn Abdullah: "The Prophet, peace and blessings of Allah be upon him, came to a mosque—meaning the [mosque of the] Confederates (al-Ahzab)—and he placed his cloak down and stood. He raised his hands, extending them, supplicating against them, and he did not pray. He said: Then he came and supplicated against them, and he prayed."