Musnad Ahmad 289:19

Bahz narrated to us, Hammad ibn Salamah narrated to us, he said: Ya'la ibn 'Ata informed me, from Waki' ibn Hudus, from his paternal uncle Abu Razin al-'Uqayli, that he said: O Messenger of Allah, where was our Lord, the Mighty and Majestic, before He created the heavens and the earth? He said: "In a cloud (ama'), above which is air, and below which is air. Then He created His Throne upon the water."