Psalms 58:6 - Joseph Benson’s Commentary on the Old and New Testaments

Break their teeth, O God Their power and instruments of doing mischief. “The mention of teeth here, with the relative their, most probably first refers to those of the adder or serpent, immediately foregoing, whose poison and noxious power are in their teeth; and the way to disarm serpents is to deprive them of their teeth. They who keep serpents tame usually do this by putting to them a piece of red cloth, in which they love to fix their teeth, and so draw them out. This mention of teeth fairly introduces that which follows concerning the lions, whose power of doing mischief with them is more violent; and so signifies the open and riotous offender; as the serpent's teeth may imply the more secret and indiscernible wounds of the whisperer or backbiter: which yet are as dangerous and destructive as the former; by the smallest prick killing him on whom they fasten.” Dodd.