English Standard Version
You set a boundary that they may not pass, so that they might not again cover the earth.

American Standard Version
Thou hast set a bound that they may not pass over; That they turn not again to cover the earth.

Berean Study Bible
You set a boundary they cannot cross, that they may never again cover the earth.

Douay-Rheims Bible
Thou hast set a bound which they shall not pass over; neither shall they return to cover the earth.

English Revised Version
Thou hast set a bound that they may not pass over; that they turn not again to cover the earth.

King James Bible
Thou hast set a bound that they may not pass over; that they turn not again to cover the earth.

World English Bible
You have set a boundary that they may not pass over; that they don't turn again to cover the earth.

Young's Literal Translation
A border Thou hast set, they pass not over, They turn not back to cover the earth.

Psalm 104:9 Additional Translations ...