John Gill Commentary Job 29:17

"And I brake the jaws of the unrighteous, And plucked the prey out of his teeth." — Job 29:17 (ASV)

And I broke the jaws of the wicked
Their jaw teeth, or grinders, alluding to beasts of prey, who have such teeth, very large. The meaning may be, that Job confuted the arguments which wicked men used in their own defence, and against the poor, exposed their weakness, and made them ineffectual to answer their purposes.

He disabled tyrants and cruel oppressors from doing further hurt and damage to the fatherless and helpless; was an instrument in God's hand for breaking the power, weakening the hands of such persons, and hindering them from doing the mischief they otherwise would. See (Proverbs 30:14) (Psalms 3:7) (58:6) ;

and plucked the spoil out of his teeth ;
as David took the lamb out of the mouth of the bear and lion that came into his father's flock, and carried it off: thus Job delivered the poor out of the hands of such monsters in nature, comparable to beasts of prey, and saved them from being utterly ruined by them, and obliged them to restore to them what they had unrighteously taken from them.