From Sahih Bukhari (Hadith 6657):
Narrated Haritha bin Wahb:I heard the Prophet (ﷺ) saying, "Shall I tell you of the people of Paradise? They comprise every poor humble person, and if he swears by Allah to do something, Allah will fulfill it; while the people of the fire comprise every violent, cruel arrogant person
Reference: Bukhari 6657