Musnad Abu Ya'la al-Mawsili 156:17

Abu Hurairah said: The Messenger of Allah (ﷺ) said: "Who will take these words from me, so that he may act upon them or teach them to someone who will act upon them?" I said: "I will, O Messenger of Allah." He said: "He took my hand and counted five [things] in it, and said: 'Beware of the forbidden things, and you will be the most devout of people. Be content with what Allah has apportioned for you, and you will be the richest of people. Do good to your neighbor, and you will be a believer. Love for people what you love for yourself, and you will be a Muslim. And do not laugh much, for much laughter kills the heart.'"