Sunan an-Nasa'i 4989
سنن النسائي#4989SahihIt was narrated from Anas that :The Prophet [SAW] said: "There are three things, whoever attains them will find therein the sweetness of Islam: When Allah [SWT] and His Messenger [SAW] are dearer to him than all else; when he loves a person and only loves him for the sake of Allah [SWT]; and when he would hate to go back to disbelief as much as he would hate to be thrown into the fire
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 47:5