From Sahih Muslim (Hadith 7142):
Sahl b. Sa'd reported Allah's Messenger (ﷺ) as saying:The inmates of Paradise will look to the upper apartment of Paradise as you see the planets in the sky. I narrated this hadith to Nu'man b. Abi 'Ayyash and he said: I heard Abu Sa'id al-Khudri as saying: As you see the shining planets in the eastern and western (sides of) horizon
Reference: Muslim 7142