On the authority of Abu Hurayrah (may Allah be pleased with
him), that the Messenger of Allah (peace and blessings of Allah
be upon him) said:
Let him who believes in Allah and the Last Day speak good, or
keep silent; and let him who believes in Allah and the Last Day
be generous to his neighbour; and let him who believes in Allah
and the Last Day be generous to his guest.
It was related by al-Bukhari and Muslim.