10 because when Melchizedek met Abraham, Levi was still in the body of his ancestor.

Read Hebrews 7:10 Using Other Translations

For he was yet in the loins of his father, when Melchisedec met him.
for he was still in the loins of his ancestor when Melchizedek met him.
For although Levi wasn’t born yet, the seed from which he came was in Abraham’s body when Melchizedek collected the tithe from him.