Library Theodoret Questions on Exodus

Questions on Exodus 55: “You shall not sacrifice blood upon leaven”

What is the meaning of “You shall not sacrifice the blood of my sacrifice upon leaven”?

They offered unleavened loaves on the altar; he forbids offering leavened ones, teaching intelligible things through the sensible. For since unleavened bread is made on the spot, whereas leavened bread has something of the old leaven, the law forbids mixing anything of Egyptian teaching with the divine things. So also the Lord said to the holy disciples: “Beware of the leaven of the scribes and Pharisees.”

Greek: Theodoret of Cyrus, Quaestiones in Octateuchum / Questions on Exodus (CPG 6200.02; cf. Fernández Marcos and Sáenz-Badillos; also PG 80, cols. 225–298). English: study translation for BWAB Library—not the copyrighted Robert C. Hill (CUA Press) translation. The full Questions on Exodus (72 questions) is hosted here.