Anybody who believes in God and the Last Day should not harm his neighbor, and anybody who believes in God and the Last Day should entertain his guest generously.

مَنْ كَانَ يُؤْمِنُ بِاللَّه وَالْيَوْمِ الآخِرِ فَلاَ يُؤْذِ جَارَهُ

-Prophet Muhammad (saw)

Reference: Bukhari 6018