Allah Ta’ala mentions in the Qur'aan Sharief :

“VERILY THOSE WHO BELIEVE AND WORK DEEDS OF RIGHTEOUSNESS, THE MOST BENEFICENT (ALLAH) WILL BESTOW LOVE FOR THEM (IN THE HEARTS OF THE BELIEVERS).”
[SURAH MARYAM 19 : 96]

H

azrat Abu Hurairah رضي الله عنه has related the following from Rasulullah صلى الله عليه وسلم  : “If Allah loves a person, He calls Jibra'eel (‘Alaihis Salaam) saying : “Allah loves so and so; O Jibra'eel love him.”

Jibra'eel (‘Alaihis Salaam) would love him, and then Jibra'eel would make an announcement among the residents of the heavens : ‘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.”

In fact, love for that person spreads on earth to such an extent that even the animals in the jungles and the fish in the sea love him and pray for him.