Abu Hurairah, may Allah be pleased with him, states that the Holy Prophet, peace and blessings of Allah be upon him, said:
“O Abu Hurairah, be righteous and you will be the best of worshippers. Be content, so that you can be the best of those who are grateful. Choose for others what you like for yourself, then you will become a [true] believer. Treat your neighbour in the best of manners then you will be worthy of being a Muslim. Do not laugh excessively, because excessive laughter causes the heart to die.”
(Sunan Ibn Majah)