Berean Study Bible
For according to the final instructions of David, the Levites twenty years of age or older were counted,

King James Bible
For by the last words of David the Levites were numbered from twenty years old and above:

American Standard Version
For by the last words of David the sons of Levi were numbered, from twenty years old and upward.

Darby Bible Translation
For by the last words of David was this [done], -- the numbering of the sons of Levi from twenty years old and upward.

Douay-Rheims Bible
So according to the last precepts of David, the sons of Levi are to be numbered from twenty years old and upward.

English Revised Version
For by the last words of David the sons of Levi were numbered, from twenty years old and upward.

Young's Literal Translation
for by the last words of David they took the number of the sons of Levi from a son of twenty years and upward,