Why does Hebrews 10:5 say 'a body you have prepared' instead of 'ears you have dug'?

This is one of the most striking translation differences in the whole New Testament, and there are actually three forms of this verse — not two — once you look at the evidence.

The Hebrew of Psalm 40:6 reads: "ears you have dug for me." The verb is כָּרָה (karah, H3738), the ordinary word for digging a pit or a well. The image is the opening of the ears to hear and obey — not something cut or prepared, but bored open. The subject is obedience: the psalmist is saying that God opened his ears rather than asking for animal sacrifice.

The most common Greek Psalter (LXX) form translates the same verse: "ears you have prepared for me." The verb becomes καταρτίζω (katartizō, G2675), which means "to put in order, to prepare, to fit together." The ear image stays — ὠτία, "little ears," the diminutive form — but the digging is replaced with a gentler fitting-out.

A second Greek Psalter tradition, circulating independently, read "a body you have prepared for me." The noun shifts from ὠτία ("ears") to σῶμα ("body"). The verb κατηρτίσω (G2675) stays the same. Hebrews 10:5 quotes this second form: "a body you have prepared for me" (σῶμα δὲ κατηρτίσω μοι).

"Consequently, when Christ came into the world, he said: 'Sacrifices and offerings you have not desired, but a body you have prepared for me.'" — Hebrews 10:5

The author of Hebrews is not free-handing or misquoting. He is citing a version of the Greek Psalter that existed separately from the more common ὠτία form. Both "ears" and "body" go back to Greek Psalter streams that circulated in the first century.

But here is where it gets theologically dense: the author of Hebrews chose this version because it carries the incarnation argument he is building. He is explaining why animal sacrifice is ended — not by a decree, but by the arrival of the very thing the sacrificial system was anticipating. A prepared body is the whole point. The eternal Son entered the world with a body of flesh (Heb. 10:5), lived a life of obedience in that body (Heb. 10:7, "I have come to do your will, O God"), and then offered that body once for all (Heb. 10:10). The digging of ears — the Hebrew's image of obedience — has become in the Greek stream the preparing of a body for sacrifice. Both images point toward the same thing. The author of Hebrews used the version that made the point most precisely.

This is a small window into how the apostolic authors worked. They did not manufacture quotations. They cited existing text forms — and when a text form they already had in hand expressed the theological reality more exactly than another form did, they used it. Hebrews 10:5 is not a case of careless citation or creative invention. It is a case of a careful author selecting the reading of the Greek Psalter that bore the weight of his argument best.

The three text-forms of Psalm 40:6 sit side by side in the full study Which Old Testament?, with the Hebrew, the two Greek streams, and the Hebrews adaptation laid out in detail.