At midnight all the first-born of the Egyptians are slain and Pharaoh sends the Israelites out of Egypt in haste, and the people took the dough before it was leavened upon kneading troughs upon their shoulders.
With regard to the abstention from leavened bread, the inquiry is somewhat more complicated.
The attempt of modern critics to account for the period as that in which the barley harvest was gathered in, during which the workers in the field could not prepare leavened bread, is not satisfactory.
The decree explains the filioque in a manner acceptable to the Greeks, but does not require them to insert the term in their symbol; it demands that celebrants follow the custom of their own church as to the employment of leavened or unleavened bread in the Eucharist.