American Standard Version
Wherefore be ye not foolish, but understand what the will of the Lord is.

Berean Study Bible
Therefore do not be foolish, but understand what the Lord’s will is.

Douay-Rheims Bible
Wherefore become not unwise, but understanding what is the will of God.

English Revised Version
Wherefore be ye not foolish, but understand what the will of the Lord is.

King James Bible
Wherefore be ye not unwise, but understanding what the will of the Lord is.

World English Bible
Therefore don't be foolish, but understand what the will of the Lord is.

Young's Literal Translation
because of this become not fools, but -- understanding what is the will of the Lord,

Ephesians 5:17 Additional Translations ...