From Sahih Bukhari (Hadith 3256):
Narrated Abu Sa`id Al-Khudri:The Prophet (ﷺ) said, "The people of Paradise will look at the dwellers of the lofty mansions (i.e. a superior place in Paradise) in the same way as one looks at a brilliant star far away in the East or in the West on the horizon; all that is because of their superiority over one another (in rewards)." On that the people said, "O Allah's Messenger (ﷺ)! Are these lofty mansions for the prophets which nobody else can reach? The Prophet (ﷺ) replied," No! "By Allah in whose Hands my life is, these are for the men who believed in Allah and also believed in the Apostles
Reference: Bukhari 3256