For a guest remembers all his days the hospitable man who showed him kindness.

[Τοῦ γάρ τε ξεῖνος μιμνῄσκεται ἤματα πάντα
ἀνδρὸς ξεινοδόκου, ὅς κεν φιλότητα παράσχῃ.]

Homer (fl. 7th-8th C. BC) Greek author
The Odyssey [Ὀδύσσεια], Book 15, l. 54ff [Pisistratus] (c. 700 BC) [tr. Palmer (1891)]
    (Source)

(Greek Source). Alternate translations:

Not a guest
Shall touch at his house, but shall store his breast
With fit mind of an hospitable man,
To last as long as any daylight can
His eyes recomfort, in such gifts as he
Will proofs make of his hearty royalty.
[tr. Chapman (1616)]

For guests use always to remember those
By whom they have been entertain’d with love.
[tr. Hobbes (1675), ll. 49-50]

For the guest in mem’ry holds
Through life, the host who treats him as a friend.
[tr. Cowper (1792), l. 64-65]

For when a host with friendship void of blame
Gives of his choicest, men observe his name,
And hold it all their lives exceeding dear.
[tr. Worsley (1861), st. 7]

A guest remembers thro' life's livelong days
That host, who gives him sterling proofs of love!
[tr. Bigge-Wither (1869)]

For of him a guest is mindful all the days of his life, even of the host that shows him loving-kindness.
[tr. Butcher/Lang (1879)]

Since forsooth the guest remembereth that man for all his days
Who giveth him good guesting in friendly wise and dear.
[tr. Morris (1887)]

So long as he lives a guest should never forget a host who has shown him kindness.
[tr. Butler (1898)]

For a guest remembers all his days the host who shews him kindness.
[tr. Murray (1919)]

A guest never forgets the host who has treated him kindly.
[tr. Rieu (1946)]

A guest remembers all his days that hose who makes provision for him kindly.
[tr. Fitzgerald (1961)]

A guest will keep in memory, held close, the gift of friendship given by his host.
[tr. Mandelbaum (1990)]

That’s the man a guest will remember all his days:
the lavish host who showers him with kindness.
[tr. Fagles (1996)]

A guest remembers
A host's hospitality for as long as he lives.
[tr. Lombardo (2000)]

As you know, a guest remembers for all his days the man who has welcomed him hospitably and shown friendship towards him.
[tr. Verity (2016)]