(41) باب الْمِقَةِ مِنَ اللَّهِ تَعَالَى
Narrated Abu Huraira:
The Prophet (ﷺ) said, "If Allah loves a person, He calls Gabriel saying: 'Allah loves so and so; O Gabriel, love him.' Gabriel would love him, and then Gabriel would make an announcement among the residents of the Heaven, 'Allah loves so-and-so, therefore, you should love him also.' So, all the residents of the Heavens would love him and then he is granted the pleasure of the people of the earth."
Reference: Sahih al-Bukhari 6040
In-book reference: Book 78, Hadith 70
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 73, Hadith 66