Deuteronomy 18:11 lists 'charmer' among forbidden practices, giving background to the snake charmer imagery here.

Ecclesiastes 10:11 directly parallels the image: a serpent that bites before being charmed makes the charmer useless.

Jeremiah 8:17 uses the same metaphor of adders that cannot be charmed, sent as judgment.

Zechariah 7:11 describes people stopping their ears in stubbornness, mirroring the adder's refusal to hear.

Isaiah 19:3 describes Egypt consulting charmers and mediums, echoing the theme of ineffective enchantment.