Psalm 40:6-8 in Hebrews 10
¡6 (NIV) Sacrifice and offering you did not desire, but my ears you have pierced{[6] Septuagint but a body you have prepared for me}; burnt offerings and sin offerings you did not require. 7 Then I said, "Here I am, I have come--it is written about me in the scroll. 8 I desire to do your will, O my God; your law is within my heart."
¡Author is arguing that Christ is the real sacrifice that animals offerings foreshadowed.