He who believes in God and the Last Day should be hospitable to his guest. I.e. Serve him for three days. If the guest stays beyond that, then entertaining him is an act of Sadaqah (Alms)

He who believes in God and the Last Day should be hospitable to his guest. I.e. Serve him for three days. If the guest stays beyond that, then entertaining him is an act of Sadaqah (Alms)

Reference:  http://muntakhabahadith.com