King James Bible
For which I am an ambassador in bonds: that therein I may speak boldly, as I ought to speak.

New King James Version
for which I am an ambassador in chains; that in it I may speak boldly, as I ought to speak.

American Standard Version
for which I am an ambassador in chains; that in it I may speak boldly, as I ought to speak.

Berean Study Bible
for which I am an ambassador in chains. Pray that I may proclaim it fearlessly, as I should.

Douay-Rheims Bible
For which I am an ambassador in a chain, so that therein I may be bold to speak according as I ought.

English Revised Version
for which I am an ambassador in chains; that in it I may speak boldly, as I ought to speak.

World English Bible
for which I am an ambassador in chains; that in it I may speak boldly, as I ought to speak.

Young's Literal Translation
for which I am an ambassador in a chain, that in it I may speak freely -- as it behoveth me to speak.

Ephesians 6:20 Additional Translations ...