Strong's numbers

ξένος (G3581)

xénos

xen'-os

apparently a primary word; foreign (literally, alien, or figuratively, novel); by implication, a guest or (vice-versa) entertainer:--host, strange(-r).

Abbott–Smith

ξένος, -η, -ον, [in LXX chiefly for נׇכְרִי;]

(a) foreign, alien: δαιμόνια, Ac 17:18; διδαχαί, He 13:9;

(b) c. gen. rei, strange to, estranged from, ignorant of : Eph 2:12;

As subst., ὁ ξ.,

(a) a foreigner, stranger: Mt 25:35, 38, 43, 44 27:7, Ac 17:21, III Jo 5; ξένοι κ. τάροικοι (opp. to συμπολῖται, οίκεῖοι), Eph 2:19; ξ. καὶ παρεπίδημοι, He 11:13;

(b) one of the parties bound by ties of hospitality;

α the guest;

β the host ( = ξενοδόκος, Hom., Il., xv, 532): Ro 16:23.†

From G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), in the public domain.

14 occurrences

Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.

Hebrews 11:13
These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.
Hebrews 13:9
Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.
1 Peter 4:12
Beloved, think it not strange concerning the fiery trial which is to try you, as though some strange thing happened unto you:
3 John 1:5
Beloved, thou doest faithfully whatsoever thou doest to the brethren, and to strangers;