Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: On the night of the Confederates (al-Ahzab), "al-Saba" (the east wind) came to "al-Shamal" (the north wind) and said: "Come along, so that we may help the Messenger of Allah." The north wind said: "A free woman does not travel by night." So the wind by which the Messenger of Allah (peace and blessings be upon him) was helped is "al-Saba".
Al-Bazzar recorded it, and its narrators are the narrators of the Sahih.