Exodus 12:18

18In the first month, on the fourteenth day of the month, toward evening, you shall consume the unleavened bread, until the twenty-first day of the same month, toward evening.
12:18 Unleavened bread: By this it appears, that our Saviour made use of unleavened bread, in the institution of the blessed sacrament, which was on the evening of the paschal solemnity, at which time there was no leavened bread to be found in Israel.(Challoner)
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