Matthew 18:6

But whosoever may offend one of these little ones, who believe in me, it is good for him that a millstone may be hanged to his neck, and he may be drowned in the depth of the sea.

Mark 9:42

Whosoever may offend one of these little ones who believe in me, rather is it good for him, if a millstone is hung about his neck, and he may be cast into the sea.

Matthew 18:10

See that you do not despise one of these little ones; for I say unto you, that their angels in heaven do always behold the face of my Father who is in the heavens.

Matthew 18:14

So it is not the will of your Father who is in the heavens, that one of these little ones may perish.

Luke 17:1-2

And He spoke to His disciples, It is impossible for offenses not to come: but woe unto him, through whom they come;

Acts 9:5

And He said, I am Jesus whom you are persecuting.

Romans 14:13-15

Then let us no longer judge one another: but rather judge this, not to place before a brother an offence for a stumblingblock.

Romans 14:21

it is good neither to eat flesh, nor to drink wine, nor anything by which your brother stumbles.

Romans 15:1-3

But we who are strong ought to bear the infirmities of the weak, and not to please ourselves.

1 Corinthians 8:9-13

See lest this liberty of yours may become a stumblingblock to the weak.

1 Corinthians 10:32-33

Be ye without offence, both to Jews, and to Greeks, and to the church of God:

2 Thessalonians 1:6-9

if indeed it is a righteous thing with God to recompense tribulation to them who are troubling 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 you do not despise one of these little ones; for I say unto you, that their angels in heaven do always behold the face of my Father who is in the heavens.
Luke 17:2
it is good for him if a millstone is hung around his neck, and he is cast into the sea, rather than that he may offend one of these little ones.

General references

2 Corinthians 6:3
giving no occasion of stumbling in anything, in order that the ministry may not be blamed;
Philippians 2:4
looking not each after your own interests, but each after that of others.