Hadith #3109 (Jami' al-Tirmidhi)
Book: Chapters on Tafsir
Narrator(s): Abu Zara' al-Razi أبو زرعة الرازي, al-Fadl bin Abi Talb Akhw الفضل بن أبي طالب, al-Hakam bin 'Abdul Malik الحكم بن عبد الملك القرشي, al-Hasan bin Bashr bin Slm الحسن بن بشر بن سلم, Imran bin Husain, Qatada قتادة

from his uncle Abu Razin who said: “I said: ‘O Messenger of Allah! Where was our Lord before He created His creation?’ He said: ‘He was (above) the clouds – no air was under him, no air was above him, and He created His Throne upon the water.'”
Ahmad said: “Yazid bin Harun said (regarding) the air – ‘It means there was nothing with him.”

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-3109/