Hebrews 7:9
And as I may so say, Levi also, who receiveth tithes, payed tithes in Abraham.
Cross-reference
Hebrews 7:4
Historical context
Hebrews 7:4 provides the background that Abraham gave a tenth to Melchizedek, the event underlying Levi's payment through Abraham.
Genesis 14:20
Citation
Genesis 14:20 records Abraham giving a tenth to Melchizedek, the original event referenced in Hebrews 7:9.
Romans 5:12
Parallel
Romans 5:12 uses similar representative logic — all sinned in Adam — paralleling Levi's inclusion in Abraham's loins.