The Prophet (ﷺ) said: The most perfect believer in respect of faith is he who is best of them in manners.
Sunan Abi Dawud Book 42, Hadith 87
← Previous Hadith The Prophet (ﷺ) said: If anyone loves for Allah's sake, hates for Allah's sake, gives for Allah's sake and withholds for Allah's sake, he will have perfect faith.

Sunan Abi Dawud Book 42, Hadith 86 Next Hadith → The Prophet (May peace be upon him) gave some people and did not give anything to a man of them. Sa’d said : Messenger of Allah! You gave so and so, so and so, but did not give anything to so and so while he is a believer. The Prophet (May peace be upon him) said : Or he is a Muslim. Sa’d repeated it thrice and the Prophet (May peace be upon him) then said : I give some people and leave him who is dearer to me than them. I do not give him anything fearing lest he should fall into Hell on his face.

Sunan Abi Dawud Book 42, Hadith 88