23 The Lord spoke again to Moses, saying, 2 “Speak to the sons of Israel and say to them, ‘The Lord’s appointed times which you shall proclaim as holy convocations—My appointed times are these:
3 ‘For six days work may be done, but on the seventh day there is a sabbath of complete rest, a holy convocation. You shall not do any work; it is a sabbath to the Lord in all your dwellings.
4 ‘These are the appointed times of the Lord, holy convocations which you shall proclaim at the times appointed for them. 5 In the first month, on the fourteenth day of the month [a]at twilight is the Lord’s Passover. 6 Then on the fifteenth day of the same month there is the Feast of Unleavened Bread to the Lord; for seven days you shall eat unleavened bread. 7 On the first day you shall have a holy convocation; you shall not do any laborious work. 8 But for seven days you shall present an offering by fire to the Lord. On the seventh day is a holy convocation; you shall not do any laborious work.’”
9 Then the Lord spoke to Moses, saying, 10 “Speak to the sons of Israel and say to them, ‘When you enter the land which I am going to give to you and reap its harvest, then you shall bring in the sheaf of the first fruits of your harvest to the priest. 11 He shall wave the sheaf before the Lord for you to be accepted; on the day after the sabbath the priest shall wave it. 12 Now on the day when you wave the sheaf, you shall offer a male lamb one year old without defect for a burnt offering to the Lord. 13 Its grain offering shall then be two-tenths of an ephah of fine flour mixed with oil, an offering by fire to the Lord for a soothing aroma, with its drink offering, a fourth of a [b]hin of wine. 14 Until this same day, until you have brought in the offering of your God, you shall eat neither bread nor roasted grain nor new growth. It is to be a perpetual statute throughout your generations in all your dwelling places.
15 ‘You shall also count for yourselves from the day after the sabbath, from the day when you brought in the sheaf of the wave offering; there shall be seven complete sabbaths. 16 You shall count fifty days to the day after the seventh sabbath; then you shall present a new grain offering to the Lord. 17 You shall bring in from your dwelling places two loaves of bread for a wave offering, made of two-tenths of an[c]ephah; they shall be of a fine flour, baked with leaven as first fruits to the Lord.18 Along with the bread you shall present seven one year old male lambs without defect, and a bull of the herd and two rams; they are to be a burnt offering to the Lord, with their grain offering and their drink offerings, an offering by fire of a soothing aroma to the Lord. 19 You shall also offer one male goat for a sin offering and two male lambs one year old for a sacrifice of peace offerings. 20 The priest shall then wave them with the bread of the first fruits for a wave offering with two lambs before the Lord; they are to be holy to the Lord for the priest. 21 On this same day you shall make a proclamation as well; you are to have a holy convocation. You shall do no laborious work. It is to be a perpetual statute in all your dwelling places throughout your generations.
22 ‘When you reap the harvest of your land, moreover, you shall not reap to the very corners of your field nor gather the gleaning of your harvest; you are to leave them for the needy and the alien. I am the Lord your God.’”
23 Again the Lord spoke to Moses, saying, 24 “Speak to the sons of Israel, saying, ‘In the seventh month on the first of the month you shall have a [d]rest, a reminder by blowing of trumpets, a holy convocation. 25 You shall not do any laborious work, but you shall present an offering by fire to the Lord.’”
The Passover, which was naturally a big deal, reminded them of their release from slavery. Next to that, they were to have holy “convocations” to remember that God was the one who had provided for them in this new land.
The first fruits belonged to God always, and then, 50 days later (after 7 sabbaths had passed), which likely represented the end of the harvest, they were to come together again and thank God for his provision by offering another sacrifice.
It is good for us to remember that the labor of our own hands is not really our own. It is a gift from God, just as the very breath we breath, and all of creation around us. We are stewards of a great gift, not to be taken for granted.