Six days, to wit, besides the first day, on which the passover was killed; or rather besides the seventh and the last day, which is here mentioned apart, not as if leavened bread might be eaten then, for the contrary was evident from many places, but because there was something more to be done, to wit, a solemn assembly to be kept. So in all there were seven days, as it is said, Exodus 12:15 Leviticus 23:6 Numbers 28:17.
Related Commentaries of Deuteronomy 16:8
Deuteronomy 16:8
8 Six days thou shalt eat unleavened bread: and on the seventh day shall be a solemn assembly to the LORD thy God: thou shalt do no work therein.