Matthew Poole and continuators on Judges 10:16

16 And they put away the strange gods from among them , and served the LORD: and his soul was grieved for the misery of Israel.

This was an evidence of the sincerity of their sorrow, that they did not only confess and bewail their Sins, but also forsake them, and loath themselves for them.

Not properly, or as to inward affection; for God being infinitely happy, is not capable of grieving: but figuratively, and as to outward expression. He acted towards them, like one that felt their Sufferings; he had pity upon them, repented of his severe Proceedings against them, and quite changed his carriage towards them, and punished their Enemies as sorely as if they had grieved and injured his own person.

Marginal references: Heb. gods of strangers.; Isa. 63. 9.; Heb. was shortned.