Psalms 10:15 - Matthew Poole's English Annotations on the Holy Bible

Break thou; or, Thou wilt break. For it may be either a prayer or a prophecy. The arm, i.e. his strength, the instrument of violence and mischief. Seek out his wickedness; search for it so strictly, and punish these wicked atheists so severely. Till thou find none, i.e. no such wickedness, to wit, undiscovered and unpunished, or indeed left in the world, or at least in the church; which might happen, because those wicked men here spoken of should be generally either convinced or rooted out, and the rest should be warned and reformed by their example, and so this lewdness should cease out of the land, as the phrase is, Ezekiel 23:48. That is said to be sought for, and not found, which is utterly lost, as Job 20:7,8 Psa 37:36 Revelation 16:20, Revelation 18:21. And this phrase is used both of good men, whose sins are taken away by God's grace and mercy, pardoning and purging them away, and of wicked men in the sense above mentioned.