Exodus 12:1-4 "And the LORD spake unto Moses and Aaron in the land of Egypt, saying, This month shall be unto you the beginning of months: it shall be the first month of the year to you. Speak ye unto all the congregation of Israel, saying, In the tenth day of this month they shall take to them every man a lamb, according to the house of their fathers, a lamb for an house: And if the household be too little for the lamb, let him and his neighbour next unto his house take it according to the number of the souls; every man according to his eating shall make your count for the lamb."
In chapter eleven, the LORD told Pharaoh through Moses and Aaron that He was going to move through the land of Egypt around midnight. This would indicate the time of the coming of a new day. In this new day, He was going to destroy the firstborn out of every house in the land of Egypt. This would be a new day because this time Pharaoh would send them out of the land with everything they had.
In the beginning of this chapter, we see that it is not only going to be a new day but also a new reckoning of years for the children of Israel. Before he brought the final act that released them from Egyptian bondage, the LORD had a new command for Moses and Aaron. This was spoken to them while they were still in the land of Egypt. His words were to be told to the entire congregation of Israel.
The current month, in which the LORD would deliver them from Egyptian bondage, was to be reckoned by them as the beginning of the new year. In the tenth day of this month, they were set aside a lamb for each household. If the household was too small to eat the lamb in one sitting, then they were to join with their neighbor. There would be nothing wasted.
God inspired men to write His word in a particular way for a reason. He gave Moses and Aaron these instructions for something that would be kept the night of their release from bondage (and subsequent years after) while they were still in the land of bondage. The LORD speaks to us of things of liberty even before we are free because His word and His purpose are sure. When the LORD delivers us from bondage, our lives take on new perspectives and new purposes. According to His word, there is a Lamb for the household of faith and nothing of it is wasted. May we be blessed to understand the solemnity in this fellowship as we partake of the Lamb.