Matthew 18:6

but whosoever shall lay a stumbling-block in the way of one of these little ones, who believe in me, it were better for him that a milstone were hung on his neck, and that he were thrown into the sea.

Mark 9:42

And whosoever shall cause one of these little ones, that believe in me, to offend, it were better for him, if a milstone were laid upon his neck, and he were cast into the sea.

Matthew 18:10

See that ye despise not one of these little ones; for I tell you, that their angels in heaven do continually appear in the presence of my father, who is in heaven:

Matthew 18:14

Even so it is not the will of your heavenly Father, that any one of these little ones should be lost.

Luke 17:1-2

Then said He to the disciples, It is impossible that offences should not come: but wo to him by whom they come.

Acts 9:5

And he said, Who art Thou, Lord? And the Lord said, I am Jesus the Nazarene whom thou art persecuting: it is hard for thee to kick against the goads.

Romans 14:13-15

Let us not therefore judge one another any more: but judge this rather, not to lay a stumbling-block or scandal before a brother.

Romans 14:21

It is good not to eat flesh, nor to drink wine, nor to do any thing at which thy brother stumbleth, or is offended, or weakened.

Romans 15:1-3

Now we that are strong, ought to bear the infirmities of the weak, and not to please ourselves:

1 Corinthians 8:9-13

But see that this liberty of yours be not by any means a stumbling-block to the weak.

1 Corinthians 10:32-33

Behave inoffensively both to the Jews, and to the Greeks, and to the church of God.

2 Thessalonians 1:6-9

seeing it is a righteous thing with God to render affliction to those that afflict 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 tell you, that their angels in heaven do continually appear in the presence of my father, who is in heaven:
Luke 17:2
It were better for him that a milstone were hung about his neck, and he were thrown into the sea, than that he should cause one of these little ones to offend.

General references

2 Corinthians 6:3
We give no offence in any thing, that the ministry be not blamed:
Philippians 2:4
Look not every one to his own interests only, but every one also to the concerns of others.