Hebrews 7:5

For indeed, the descendants of Levi, who are appointed to the priesthood, are commanded by the law of Moses to collect a tenth [of the income] of the Israelites, who are their brothers, even though these brothers are [also] descendants of Abraham.

Hebrews 5:4

And no one takes on himself the honor [of head priest], but [he is appointed only] when he is called by God, as was the case with Aaron.

Hebrews 7:10

for when Melchizedek met him, he was still in Abraham's body [i.e., Levi had not yet been born as a descendant of Abraham].

Treasury of Scripture Knowledge

Summary

And verily they that are of the sons of Levi, who receive the office of the priesthood, have a commandment to take tithes of the people according to the law, that is, of their brethren, though they come out of the loins of Abraham:

General references

Bible References

Who

Hebrews 5:4
And no one takes on himself the honor [of head priest], but [he is appointed only] when he is called by God, as was the case with Aaron.

Come

Hebrews 7:10
for when Melchizedek met him, he was still in Abraham's body [i.e., Levi had not yet been born as a descendant of Abraham].

General references

Hebrews 7:10
for when Melchizedek met him, he was still in Abraham's body [i.e., Levi had not yet been born as a descendant of Abraham].