Be not forgetful to entertain strangers: for thereby some have entertained angels unawares.
της φιλοξενιας μη επιλανθανεσθε δια ταυτης γαρ ελαθον τινες ξενισαντες αγγελους
Hebrews 13:2
The same idea in other traditions
Giving and righteous conduct, kindness to relatives, blameless deeds: this is the highest blessing.
By doing service he acquires the Karman which brings about for him the nâman and gôtra of a Tîrthakara.
Shammai said, Make thy Thorah an ordinance; say little and do much; and receive every man with a pleasant expression of countenance.
Kind words and the covering of faults are better than charity followed by injury. Allah is free of all wants, and He is Most-Forbearing.
In the midst of this world, do seva, and you shall be given a place of honor in the Court of the Lord. Says Nanak, swing your arms in joy!
Fan Ch'ih asked about benevolence. The Master said, "It is to love all men." He asked about knowledge. The Master said, "It is to know all men." …
A woman said to her husband: “Do not again buy bread from the baker in this street. Make thy purchases in the market, for this man shows wheat and sells barley, and he has no customers but a swarm of flies.” “O light of my life,” the husband answered, “pay no heed to his trickery. In the hope of our custom has he settled in this place, and not humane would it be to deprive him of his profits.” Follow the path of the righteous, and, if thou stand upon thy feet, stretch out thy hand to them that are fallen.