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.

tn Grk “the millstone of a donkey.” This refers to a large flat stone turned by a donkey in the process of grinding grain (BDAG 661 s.v. μύλος 2; L&N 7.68-69). The same term is used in the parallel account in Matt 18:6.

sn The punishment of drowning with a heavy weight attached is extremely gruesome and reflects Jesus’ views concerning those who cause others who believe in him to sin.

sn The kingdom of God belongs to such as these. Children are a picture of those whose simple trust illustrates what faith is all about. The remark illustrates how everyone is important to God, even those whom others regard as insignificant.