On First Fruits, the counting of the Omer, the fifty days and seven weekly Sabbaths till Shavuot (Pentecost) begins. In Jewish tradition, Yahveh’s provision of the First Fruits and our obedience in offering them up to Him on haBikkurim constitutes the assurance that Yahveh will provide the rest off the harvests. On Shavuot, the first fruits of wheat harvest were brought before the Lord along with the best of the First Fruits of trees and other produce.
The First Fruits of the Resurrection Y'shua presented to His Father on Resurrection Day were the assurance that Yahveh would provide the greater harvest of souls that Y'shua died to procure. That harvest began when Y'shua poured out the Holy Spirit on all flesh on Shavout (Pentecost).
The First Fruits of Shavuot are presented in the form of two great loaves of leavened bread which are waived before the Lord. These loaves represent the two houses of Israel, Judah and Ephraim, which will be reunited in the end times. Gentile believers who are part of Ephraim by birth or adoption will one day be united with Judah when the kingdom is restored to Israel. This is why so many gentiles are being drawn back to their Hebrew roots and to keeping the Feasts of the Lord.