Matthew 18:6

And whosoever shall cause one of these little ones, who believe in me, to stumble, it were better for him that a millstone was hung at his neck, and that he was sunk in the depth of the sea.

Mark 9:42

And whosoever shall give occasion of offence to one of these little ones who believe in me, it were desirable for him rather that a milestone were hanged about his neck, and that he were cast into the sea.

Matthew 18:10

See that ye despise not one of these little ones, for I say unto you, That their angels in heaven continually behold the face of my Father who is in heaven.

Matthew 18:14

Even so it is not the will of your Father who is in heaven, that one of these little ones perish.

Luke 17:1-2

THEN he said to his disciples, It is impossible that offences should not come; but wo to him through whom they come!

Acts 9:5

Then said he, Who art thou, Lord? And the Lord said, I am Jesus whom thou art persecuting: It is difficult for thee to kick against the goads.

Romans 14:13-15

Let us therefore no more judge one another; but judge this rather, that no one put a stumbling-block or offence before his brother.

Romans 14:21

It is laudable not to eat flesh, or to drink wine, nor to do any thing whereby thy brother is stumbled, or scandalized, or weakened.

Romans 15:1-3

WE then that are strong, ought to bear the infirmities of those who are feeble, and not to gratify ourselves.

1 Corinthians 8:9-13

But take heed that this power of yours become not an occasion of stumbling to the weak.

1 Corinthians 10:32-33

Give no occasion of stumbling either to the Jews or the Gentiles, or the church of God:

2 Thessalonians 1:6-9

seeing it is a righteous thing with God to recompense tribulation to them that trouble you;

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

Little

Matthew 18:10
See that ye despise not one of these little ones, for I say unto you, That their angels in heaven continually behold the face of my Father who is in heaven.
Luke 17:2
It would be advantageous for him, if a milstone were hanged about his neck, and he were cast into the sea, rather than offend one of these little ones.

General references

2 Corinthians 6:3
Giving no offence in any thing, that the ministry be not blamed:
Philippians 2:4
Let not each aim at their own particular interests, but every man at those of others.