From 'Abdullāh b. 'Amr Raḍi-Allāhu 'Anhu who narrated:
The Prophet Ṣallallāhu-'Alaihi Wa Sallam was asked: O Messenger of Allāh who are the best of people?, he answered: “Everyone who has a Makhmoom heart and a truthful tongue”,
They asked: We know what a truthful tongue is but what is a Makhmoom heart?, he Ṣallallāhu-'Alaihi Wa Sallam said: “It is a pious, pure (heart) which has no sin in it, neither it's oppressive nor it contains grudge and jealousy.”
● [صححه الألباني في صحيح ابن ماجه ٢٨٨٩]
(Authenticated by al-Albani in Saheeh Ibn Majah)