חֲמַת־לָ֗מוֹ כִּדְמ֥וּת חֲמַת־נָחָ֑שׁ כְּמוֹ־פֶ֥תֶן חֵ֝רֵ֗שׁ יַאְטֵ֥ם אָזְנֽוֹ׃
Rashi on Psalms
They have venom They have venom to kill people, like the venom of a serpent.
Rashi on Psalms
like a deaf cobra that closes its ear When the snake ages, it becomes deaf in one ear, and closes the other ear with dust so that it should not hear the incantation of the charmer, adjuring it not to cause injury.