GOD'S WORD® Translation
but they had descendants who were still in the land. Solomon drafted them for slave labor. ( They are still [slaves] today.)

American Standard Version
their children that were left after them in the land, whom the children of Israel were not able utterly to destroy, of them did Solomon raise a levy of bondservants unto this day.

Berean Study Bible
their descendants who remained in the land, those whom the Israelites were unable to devote to destruction—Solomon conscripted these people to be forced laborers, as they are to this day.

Douay-Rheims Bible
Their children, that were left in the land, to wit, such as the children of Israel had not been able to destroy, Solomon made tributary unto this day.

English Revised Version
their children that were left after them in the land, whom the children of Israel were not able utterly to destroy, of them did Solomon raise a levy of bondservants, unto this day.

King James Bible
Their children that were left after them in the land, whom the children of Israel also were not able utterly to destroy, upon those did Solomon levy a tribute of bondservice unto this day.

World English Bible
their children who were left after them in the land, whom the children of Israel were not able utterly to destroy, of them did Solomon raise a levy of bondservants to this day.

Young's Literal Translation
their sons who are left behind them in the land, whom the sons of Israel have not been able to devote -- he hath even lifted up on them a tribute of service unto this day.

1 Kings 9:21 Additional Translations ...