1 Corinthians 6:8

But ye do wrong and defraud, and that even your brethren.

2 Corinthians 11:22

Are they Hebrews? so am I: are they Israelites? so am I: are they the seed of Abraham?

Philippians 3:5

having been circumcised on the eighth day, of the race of Israel, of the tribe of Benjamin, an Hebrew of Hebrews, with respect to the law a pharisee,

Treasury of Scripture Knowledge

Summary

That every man should let his manservant, and every man his maidservant, being an Hebrew or an Hebrewess, go free; that none should serve himself of them, to wit, of a Jew his brother.

Bible References

Hebrew

2 Corinthians 11:22
Are they Hebrews? so am I: are they Israelites? so am I: are they the seed of Abraham?
Philippians 3:5
having been circumcised on the eighth day, of the race of Israel, of the tribe of Benjamin, an Hebrew of Hebrews, with respect to the law a pharisee,

Serve

1 Corinthians 6:8
But ye do wrong and defraud, and that even your brethren.