Halakha Bilangan 9:2: Mishneh Torah, Prayer and the Priestly Blessing

The regular sequence is interrupted for the three Festivals and for the Day of Atonement, when we read a section appertaining to the Festival and not the weekly portion of the Sabbath. Moses ordained that on each festival a section bearing upon it should be read. On every festival too, the discussion and discourse are on the topic of the day. What sections are read? On Passover, from the section concerning the festivals in the book of Leviticus (22:26-23:44). The people have however the custom of reading on the first day that beginning, "Draw out, and take unto yourselves lambs (Exodus 12:21-51); and the lesson from the Prophets is the account of the Passover at Gilgal (Joshua 5:2-15). On the second day, that beginning, "When a bullock or sheep" (Leviticus 22:26-23:44); and the lesson from the Prophets is the account of Josiah's Celebration of the Passover (II Kings 23:1-25). On the third day, that beginning, "Sanctify unto me all the first born" (Exodus 13:1-16). On the fourth day, that beginning, "If thou lend money" (Exodus 22:24-23:19). On the fifth day, that beginning, "Hew thee two tables of stone" (ibid. 34:1-26). On the sixth day, that beginning, "Let the children of Israel keep the Passover in its appointed season" (Numbers 9:1-14). On the seventh day, that beginning, "And it came to pass when Pharaoh had let the people go" (Exodus 13:17-15:26) to the end of the Song, and up to the words "I am the Lord that healeth thee"; and the lesson from the Prophets is that beginning, "And David spoke" (II Samuel 22:1-51). On the eighth day, that beginning, "All the firstling males" (Deuteronomy 15:19-16:17); and the lesson from the Prophets is that beginning, "This very day" (Isaiah 10:32-12:6).