1 Corinthians 14:11

If then I do not know the meaning of the sound, I would be to him who speaks a foreigner, and he who speaks would be a foreigner to me.

Acts 28:2

The natives showed us uncommon kindness; for they kindled a fire, and received us all, because of the present rain, and because of the cold.

Acts 28:4

When the natives saw the creature hanging from his hand, they said one to another, "No doubt this man is a murderer, whom, though he has escaped from the sea, yet Justice has not allowed to live."

Romans 1:14

I have an obligation both to Greeks and to barbarians, both to the wise and to the foolish.

1 Corinthians 14:21

In the law it is written, "By men of strange languages and by the lips of strangers I will speak to this people. Not even thus will they hear me, says the Lord."

Colossians 3:11

where there cannot be Greek and Jew, circumcision and uncircumcision, barbarian, Scythian, bondservant, freeman; but Christ is all, and in all.

Treasury of Scripture Knowledge

Summary

Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me.

Bible References

I shall

1 Corinthians 14:21
In the law it is written, "By men of strange languages and by the lips of strangers I will speak to this people. Not even thus will they hear me, says the Lord."
Acts 28:2
The natives showed us uncommon kindness; for they kindled a fire, and received us all, because of the present rain, and because of the cold.
Romans 1:14
I have an obligation both to Greeks and to barbarians, both to the wise and to the foolish.
Colossians 3:11
where there cannot be Greek and Jew, circumcision and uncircumcision, barbarian, Scythian, bondservant, freeman; but Christ is all, and in all.