John Gill

And the sucking child shall play on the hole of the asp,.... Without fear or danger: and the weaned child shall put his hand on the cockatrice's den; and suffer no damage: the meaning is explained in the next words, and to be understood of regenerate persons, both of new born babes, or just born, and all such who are weaned from their own righteousness, and live by faith on Christ, who shall not be hurt by the poison of false teachers, nor by the force of violent persecutors, now no more, See Gill (Editor's note) on "Isa 11:6".