Matthew 18:3-6

3 And said, Verily I say unto you, Except ye be converted, and become as little children, ye shall not enter into the kingdom of heaven.

4 Whosoever therefore shall humble himself as this little child, the same is greatest in the kingdom of heaven.

5 And whoso shall receive one such little child in my name receiveth me.

6 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.