1 John 2:9

Now he that saith he is in the light, and hateth his brother, is still in darkness:

1 John 2:11

But he, that hateth his brother, is in darkness, and walketh in darkness, and knoweth not where he goeth, because the darkness hath blinded his eyes.

1 John 4:20

I love God, and hateth his brother, he is a liar: for how can he, that loveth not his brother, whom he hath seen, love God whom he hath not seen?

John 9:41

Jesus replied, If ye were blind, ye would not have sin: but now ye say, We see; your sin therefore remaineth.

Romans 2:18-21

and knowest his will, and approvest things that are excellent, being instructed out of the law,

1 Corinthians 13:1-3

For if I speak with the tongues of men and angels, and have not charity, I am but as sounding brass, or a tinkling cymbal.

2 Peter 1:9

But he, that hath not these, is blind, or short-sighted, having forgot his baptismal purification from his former sins.

1 John 1:6

If we say that we have communion with Him, and walk in darkness, we lie and do not practise the truth:

1 John 2:4

He that saith, I know Him, and keepeth not his commandments, is a liar, and the truth is not in him.

1 John 3:13-17

Wonder not then, my brethren, if the world hate you:

Treasury of Scripture Knowledge

Summary

He that saith he is in the light, and hateth his brother, is in darkness even until now.

That saith

And hateth

General references

Bible References

That saith

1 John 2:4
He that saith, I know Him, and keepeth not his commandments, is a liar, and the truth is not in him.

He is

1 John 1:6
If we say that we have communion with Him, and walk in darkness, we lie and do not practise the truth:
John 9:41
Jesus replied, If ye were blind, ye would not have sin: but now ye say, We see; your sin therefore remaineth.
Romans 2:18
and knowest his will, and approvest things that are excellent, being instructed out of the law,

And hateth

1 John 3:13
Wonder not then, my brethren, if the world hate you:

Is in

1 John 2:11
But he, that hateth his brother, is in darkness, and walketh in darkness, and knoweth not where he goeth, because the darkness hath blinded his eyes.
1 Corinthians 13:1
For if I speak with the tongues of men and angels, and have not charity, I am but as sounding brass, or a tinkling cymbal.
2 Peter 1:9
But he, that hath not these, is blind, or short-sighted, having forgot his baptismal purification from his former sins.

General references

John 15:12
This is my commandment, that ye love one another, as I have loved you.
Hebrews 13:1
Let brotherly love continue.