"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...Take heed that ye despise not one of these little ones: for I say unto you, That in heaven their angels do always behold the face of my Father which is in heaven." - Matthew 18:6,10
Recommended reading:
The Bible
Is the Bible Infallible?