Contradiction with Exodus 12:17
Numbers 33:3 states that the Israelites left Egypt on the 15th day of the first month, while Exodus 12:17 emphasizes the role of the Passover and does not specify the 15th day as the departure date.
Exodus 12:17: And ye shall observe [the feast of] unleavened bread; for in this selfsame day have I brought your armies out of the land of Egypt: therefore shall ye observe this day in your generations by an ordinance for ever.
Contradiction with Exodus 12:51
Numbers 33:3 mentions the departure as related to Passover, but Exodus 12:51 emphasizes it was at the command of the Lord, without specifically noting the Passover date.
Exodus 12:51: And it came to pass the selfsame day, [that] the LORD did bring the children of Israel out of the land of Egypt by their armies.
Contradiction with Exodus 13:4
Numbers 33:3 mentions the departure on the 15th day of the first month, while Exodus 13:4 states that they left in the month of Abib, not specifically referring to the 15th day.
Exodus 13:4: This day came ye out in the month Abib.
Contradiction with Deuteronomy 16:1
Numbers 33:3 specifies the 15th day for departure, but Deuteronomy 16:1 emphasizes observing the month of Abib as the time of departure, without mentioning the exact day.
Deuteronomy 16:1: Observe the month of Abib, and keep the passover unto the LORD thy God: for in the month of Abib the LORD thy God brought thee forth out of Egypt by night.
Contradiction with Exodus 12:18
Numbers 33:3 states the journey started on the 15th, whereas Exodus 12:18 talks about observing unleavened bread from the 14th, indicating the significance of the 14th and potentially causing confusion about the day of departure.
Exodus 12:18: In the first [month], on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.