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]. (RU)
App reference (RU): Book 20, Hadith 22 (RU)
Arabic/English book reference (RU): Book 20, Hadith 1890 (RU)