God's Prophet (a.s) said: “May God have Mercy upon all who are cheerful and good-tempered.”
وقال (صلى الله عليه وآله): رحم الله كل سهل طلق.
Similar narrations
Kitāb al-Zuhd #72“The Messenger of Allah (ṣ) said, ‘O people! By Allah, I surely know that you cannot bring [joy or] comfort to the people with your wealth,...