1 Thessalonians 5:21

Prove all things; hold fast that which is good.
— 1 Thessalonians 5:21, King James Version

In other translations

World English Bible (WEB)

Test all things, and hold firmly that which is good.

American Standard Version (ASV)

prove all things; hold fast that which is good;

Young's Literal Translation (YLT)

all things prove; that which is good hold fast;