Fulfilled by Jesus at His Resurrection. Leviticus 23:10-11

On the 17th day of the month of Nisan the firstfruits of the barley harvest was gathered and waved before the Lord in celebration. On the 17th day of Nisan. Jesus rises up from the grave. He is the firstfruits from the dead. On that very day He fulfilled the feast.

Jesus raised from the dead the firstfruits of the Resurrection of the dead. Those that were spiritually dead can now be born again, thou they perish yet they may live (1 Corinthians 15:20).