American Standard Version
When the anger of God went up against them, And slew of the fattest of them, And smote down the young men of Israel.

Berean Study Bible
God’s anger flared against them, and He put to death their strongest and subdued the young men of Israel.

Douay-Rheims Bible
and the wrath of God came upon them. And he slew the fat ones amongst them, and brought down the chosen men of Israel.

English Revised Version
When the anger of God went up against them, and slew of the fattest of them, and smote down the young men of Israel.

King James Bible
The wrath of God came upon them, and slew the fattest of them, and smote down the chosen men of Israel.

World English Bible
when the anger of God went up against them, killed some of the fattest of them, and struck down the young men of Israel.

Young's Literal Translation
And the anger of God hath gone up against them, And He slayeth among their fat ones, And youths of Israel He caused to bend.

Psalm 78:31 Additional Translations ...