New King James Version
I have seen the God-given task with which the sons of men are to be occupied.

King James Bible
I have seen the travail, which God hath given to the sons of men to be exercised in it.

American Standard Version
I have seen the travail which God hath given to the sons of men to be exercised therewith.

Berean Study Bible
I have seen the burden that God has laid upon the sons of men to occupy them.

Douay-Rheims Bible
I have seen the trouble, which God hath given the sons of men to be exercised in it.

English Revised Version
I have seen the travail which God hath given to the sons of men to be exercised therewith.

World English Bible
I have seen the burden which God has given to the sons of men to be afflicted with.

Young's Literal Translation
I have seen the travail that God hath given to the sons of man to be humbled by it.

Ecclesiastes 3:10 Additional Translations ...