Adam Clarke on Psalms 9:16

The Lord is known by the judgment - It is not every casualty that can properly be called a judgment of God. Judgment is his strange work; but when he executes it, his mind is plainly to be seen. There are no natural causes to which such calamities can be legally attributed.

The wicked is snared in the work of his own hands - There is nothing that a wicked man does that is not against his own interest. He is continually doing himself harm, and takes more pains to destroy his soul than the righteous man does to get his saved unto eternal life. This is a weighty truth; and the psalmist adds: Higgaion, Selah. Meditate on this; mark it well. See on Psa 3:3 (note). Some think that it is a direction to the musicians, something like our Presto, Largo, Vivace, Allegro, "Play briskly and boldly; beat away; and let sense and sound accompany each other."