The Prophet ﷺ said, "There are three qualities that, when found in a person, allow him to taste the sweetness of faith. That he loves a person solely for the sake of Allah . That Allah
and His Messenger are more beloved to him than anything else. And that he would rather be thrown into the fire than return to disbelief after Allah has rescued him from it."
أخبرنا سويد بن نصر قال حدثنا عبد الله عن شعبة عن قتادة قال سمعت
عن النبي ﷺ قال ثلاث من كن فيه وجد حلاوة الإيمان من أحب المرء لا يحبه إلا لله عز وجل ومن كان الله عز وجل ورسوله أحب إليه مما سواهما ومن كان أن يقذف في النار أحب إليه من أن يرجع إلى الكفر بعد أن أنقذه الله منه
Bukhari transmitted it in the Book of Faith, chapter of one who dislikes returning to disbelief as he dislikes... etc., hadith no. 21, and Muslim in the Book of Faith, chapter on the qualities whose possessor finds the sweetness of faith, hadith no. 68/43, from the hadith of Shubah, by this chain.