The Prince's Responsibility for the Passover and The Feast of Tabernacles.
What is described clearly abbreviates ancient ceremonies already known, the full details of which did not need to be described. The point being made here is the Prince's responsibility for them. The Passover lambs themselves would be eaten in their houses, but what is described here are the major sacrifices on behalf of the people.
“In the first month on the fourteenth day of the month, you shall have the passover, a feast of seven days. Unleavened bread shall be eaten. And on that day the prince will prepare for himself, and for all the people of the land, a bullock for a sin offering. And for the seven days he shall prepare a whole burnt offering to Yahweh, seven bullocks and seven rams without blemish daily the seven days. And a he-goat daily for a sin offering. And he shall prepare a meal offering, an ephah for a bullock and an ephah for a ram, and a hin of oil to an ephah.”
The Passover celebrated the deliverance from Egypt (Exodus 12-13). It was thus a suitable feast to emphasise once the New Exodus had taken place. Here again was deliverance from a far country. From now on Passover (including the seven day Feast of Unleavened Bread) would celebrate two deliverances. Note how Passover and Unleavened Bread are seen as one feast. Compare 2 Chronicles 30:1-27; 2 Chronicles 35:1-19. The public celebration of Passover in style appears regularly to have been the sign of a new beginning, as the people were reminded of what their covenant God had done for them.
There was to be a daily sin offering throughout the feast to deal with the sins of the people, thus seven in all, and twice sevenfold whole burnt offerings offered in worship and praise and dedication daily, a sweet savour to Yahweh (Genesis 8:20-21; Leviticus 1:9; Leviticus 1:13), although these also included an atoning factor. Whole burnt offerings (literally ‘that which goes up') were a very ancient form of sacrifice, offered long before the deliverance from Egypt (Genesis 8:20-21; Genesis 22:2). The whole of the offering was consumed by fire. Along with the whole burnt offerings a meal offering was offered.