Sahl bin Sa'd (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) said, "The dwellers of Jannah will see the upper abodes of Jannah as you see the stars in the sky."[Al-Bukhari and Muslim]. (JA)
App reference (JA): Book 20, Hadith 22 (JA)
Arabic/English book reference (JA): Book 20, Hadith 1890 (JA)