Musnad Ahmad 25:1312

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from al-Hakam, from Mujahid, from Ibn ‘Abbas, from the Prophet, may Allah bless him and grant him peace, that he said: "I was aided by the east wind (al-saba), and ‘Ad was destroyed by the west wind (al-dabur)."