1 Corinthians 8:12

But when ye sin so against the brethren, and wound their weak conscience, ye sin against Christ.

1 John 3:15

Every one who hateth his brother is a murderer; and ye know that no murderer hath life eternal abiding in him.

Treasury of Scripture Knowledge

Summary

And Jonathan spake good of David unto Saul his father, and said unto him, Let not the king sin against his servant, against David; because he hath not sinned against thee, and because his works have been to theeward very good:

Bible References

Sin against

1 Corinthians 8:12
But when ye sin so against the brethren, and wound their weak conscience, ye sin against Christ.
1 John 3:15
Every one who hateth his brother is a murderer; and ye know that no murderer hath life eternal abiding in him.