The relationship between the Feast of First Fruits in Exodus at the time of Moses and the Resurrection of Jesus is ‘prophecy and fulfillment’.

The Feast of Firstfruits in the Old Testament is Resurrection Day in the New Testament, and prophecies must be fulfilled on Sunday.

The day the Israelites landed on the other side of the Red Sea after the Exodus was the very first day, and God made this day the Feast of Firstfruits and kept it on the next day of the Sabbath(Sunday) every year.

Christ Ahnsahnghong and God the Mother revealed the origin and true meaning of Resurrection Day.

According to the prophecy of the Feast of Firstfruits, which required a bundle of Firstfruits to be offered to God, Jesus was resurrected as the Firstfruits of those who fell asleep and gave mankind hope for resurrection. With this realization, the WMSCOG keeps Resurrection Day holy every year.

[Leviticus 23:9-11] The LORD said to Moses, "Speak to the Israelites and say to them: 'When you enter the land I am going to give you and you reap its harvest, bring to the priest a sheaf of the first grain you harvest. He is to wave the sheaf before the LORD so it will be accepted on your behalf; the priest is to wave it on the day after the Sabbath.

[Luke 24:1-6] On the first day of the week, very early in the morning, the women took the spices they had prepared and went to the tomb. They found the stone rolled away from the tomb, but when they entered, they did not find the body of the Lord Jesus.
... "Why do you look for the living among the dead?
He is not here; he has risen! Remember how he told you, while he was still with you in Galilee: