Hadith #3294 (Jami' al-Tirmidhi)
Book: Chapters on Tafsir
Narrator(s): Abdul Salam bin Harb bin Salm al-Mala'i عبد السلام بن حرب بن سلم النهدي الملائي, Adi ibn Hatim al-Tayyi', al-Husain bin Yazid bin Yahya الحسين بن يزيد بن يحيى, Ghtyf bin A'yn al-Shybany غطيف بن أعين الشيباني الجزري, Mus'ub bin Sa'd ibn Abi Waqqas مصعب بن سعد بن أبى وقاص الزهرى

from the Prophet – regarding Allah’s saying ‘And on couches raised high – he said: “Their height is as what is between the heavens and the earth, and the distance between the two of them is five hundred years.”

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-3294/