New Living Translation
Fathers, do not aggravate your children, or they will become discouraged.

American Standard Version
Fathers, provoke not your children, that they be not discouraged.

Berean Study Bible
Fathers, do not provoke your children, so they will not become discouraged.

Douay-Rheims Bible
Fathers, provoke not your children to indignation, lest they be discouraged.

English Revised Version
Fathers, provoke not your children, that they be not discouraged.

King James Bible
Fathers, provoke not your children to anger, lest they be discouraged.

World English Bible
Fathers, don't provoke your children, so that they won't be discouraged.

Young's Literal Translation
the fathers! vex not your children, lest they be discouraged.

Colossians 3:21 Additional Translations ...