1 John 2:10

He that loveth his brother abideth in the light, and there is no occasion of stumbling in him;

2 Peter 1:10

Wherefore the rather, brethren, give diligence to make your calling and election sure; for if ye do these things, ye will never fall.

1 John 3:14

We know that we have passed out of death into life, because we love the brethren; he that loveth not abideth in death.

Matthew 13:21

but, having no root within him, endureth only for a time; and when tribulation or persecution ariseth on account of the word, he immediately falleth away.

Matthew 18:7

Woe to the world because of stumblingblocks! For it must needs be that stumblingblocks come; but woe to the man through whom the stumblingblock cometh!

Luke 17:1-2

And he said to his disciples, It is impossible but that stumblingblocks will come; but woe to him through whom they come!

John 8:31

Jesus therefore said to those Jews who believed in him, If ye continue in my word, ye are truly my disciples;

Romans 9:32-33

Why? Because they did not strive for it by faith, but as being by works. For they stumbled against the stone of stumbling;

Romans 14:13

Let us then no longer judge one another; but let this rather be your judgment, not to put a stumblingblock, or an occasion to fall, in a brothers way.

Philippians 1:10

so that ye may approve the things that are most excellent, in order that ye may be pure and without offence against the day of Christ,

Treasury of Scripture Knowledge

Summary

He that loveth his brother abideth in the light, and there is none occasion of stumbling in him.

Bible References

That loveth

1 John 3:14
We know that we have passed out of death into life, because we love the brethren; he that loveth not abideth in death.
John 8:31
Jesus therefore said to those Jews who believed in him, If ye continue in my word, ye are truly my disciples;
Romans 14:13
Let us then no longer judge one another; but let this rather be your judgment, not to put a stumblingblock, or an occasion to fall, in a brothers way.
2 Peter 1:10
Wherefore the rather, brethren, give diligence to make your calling and election sure; for if ye do these things, ye will never fall.

Occasion of stumbling

Matthew 13:21
but, having no root within him, endureth only for a time; and when tribulation or persecution ariseth on account of the word, he immediately falleth away.
Matthew 18:7
Woe to the world because of stumblingblocks! For it must needs be that stumblingblocks come; but woe to the man through whom the stumblingblock cometh!
Luke 17:1
And he said to his disciples, It is impossible but that stumblingblocks will come; but woe to him through whom they come!
Romans 9:32
Why? Because they did not strive for it by faith, but as being by works. For they stumbled against the stone of stumbling;
Philippians 1:10
so that ye may approve the things that are most excellent, in order that ye may be pure and without offence against the day of Christ,

General references

John 11:10
but if a man walk in the night, he stumbleth; because the light is not in him.
John 13:35
By this will all men know that ye are my disciples, if ye have love one for another.
John 15:12
This is my commandment, that ye love one another, as I have loved you.
Hebrews 13:1
Let brotherly love continue.