Verses with the word exercised in the Old Testament (3 verses):

Ecclesiastes 1:13
And I gave my heart to seek and search out by wisdom concerning all things that are done under heaven: this sore travail hath God given to the sons of man to be exercised therewith.

Ecclesiastes 3:10
I have seen the travail, which God hath given to the sons of men to be exercised in it.

Ezekiel 22:29
The people of the land have used oppression, and exercised robbery, and have vexed the poor and needy: yea, they have oppressed the stranger wrongfully.