In the New Testament of the Holy Bible,
All nations or people who were not Jews or Christians.

For this is the will of God,
even your sanctification,
that you should abstain from fornication;
that every one of you should know
how to possess his vessel
in sanctification and honour;
not in the lust of concupiscence,
even as the Gentiles which know not God.

1 Thessalonians 4:3-5