Matthew 18:6 in the King James Version
But whoso shall offend one of these little ones which believe in me, it were better for him that a millstone were hanged about his neck, and that he were drowned in the depth of the sea.
Context
5 Whoever receives one such little child in my name receives me,
6 but whoever causes one of these little ones who believe in me to stumble, it would be better for him if a huge millstone were hung around his neck and that he were sunk in the depths of the sea.
7 “Woe to the world because of occasions of stumbling! For it must be that the occasions come, but woe to that person through whom the occasion comes!