Whether Christ paid tithes in Abraham's loins?

Objections

Objection 1 : It would seem that Christ "paid tithes" in Abraham's loins. For the Apostle says (Heb. 7:6-9) that Levi, the great-grandson of Abraham, "paid tithes in Abraham," because, when the latter paid tithes to Melchisedech, "he was yet in his loins." In like manner Christ was in Abraham's loins when the latter paid tithes. Therefore Christ Himself also paid tithes in Abraham.
Objection 2 : Further, Christ is of the seed of Abraham according to the flesh which He received from His Mother. But His Mother paid tithes in Abraham. Therefore for a like reason did Christ.
Objection 3 : Further, "in Abraham tithe was levied on that which needed healing," as Augustine says (Gen. ad lit. x). But all flesh subject to sin needed healing. Since therefore Christ's flesh was the subject of sin, as stated above (Article [7]), it seems that Christ's flesh paid tithes in Abraham.
Objection 4 : Further, this does not seem to be at all derogatory to Christ's dignity. For the fact that the father of a bishop pays tithes to a priest does not hinder his son, the bishop, from being of higher rank than an ordinary priest. Consequently, although we may say that Christ paid tithes when Abraham paid them to Melchisedech, it does not follow that Christ was not greater than Melchisedech.