Mark 9:42

9:42 “If anyone causes one of these little ones who believe in me to sin, it would be better for him to have a huge millstone tied around his neck and to be thrown into the sea.

Mark 10:14

10:14 But when Jesus saw this, he was indignant and said to them, “Let the little children come to me and do not try to stop them, for the kingdom of God belongs to such as these.