Al-Tirmidhi Hadith - Hadith 5171
Narrated by Abu Hurayrah
Allah’s Messenger (peace be upon him) said, “Who will accept those words from me and act upon them, or teach people who will act upon them?” When he replied that he would he took him by the hand and counting five characteristics, said, “If you guard against the things which are forbidden, you will be the most devout of men; if you are pleased with what Allah has allotted, you will be the richest of men; if you are kind to your neighbour, you will be a believer; if you like others to have what you like for yourself, you will be a Muslim; and do not laugh immoderately, for immoderate laughter causes the heart to die.”