8 The infant will play near the cobra’s den, and the young child will put its hand into the viper’s nest.

Read Isaiah 11:8 Using Other Translations

And the sucking child shall play on the hole of the asp, and the weaned child shall put his hand on the cockatrice' den.
The nursing child shall play over the hole of the cobra, and the weaned child shall put his hand on the adder's den.
The baby will play safely near the hole of a cobra. Yes, a little child will put its hand in a nest of deadly snakes without harm.