Waki' bin Hudus narrated that his paternal uncle Abu Razin said:
"I said: 'O Messenger of Allah, where was our Lord before He created His creation?' He said: He was above the clouds, below which was air, and above which was air and water. Then He created His Throne above the water.'" (ID)
English reference (ID): Vol. 1, Book 1, Hadith 182 (ID)
Arabic reference (ID): Book 1, Hadith 187 (ID)