Fausset's Bible Dictionary
(See.) Accompanied "peace offerings"; the right shoulder, the choicest part of the victim, was "heaved" or raised, and waved, and eaten by the worshipper. On the second day of the Passover a sheaf of green grain was waved, with the sacrifice of a first year lamb; from this began the reckoning to Pentecost. Abib, the Passover month, means the month of the green ear; the birth of Israel into national life, and the birth of the earth's fruits on which man depends into natural life, are appropriately combined in the Passover. The firstborn of men and the first produce of the earth were at once consecrated to the Lord in acknowledgment of His ownership of all. So at harvest in Pentecost the firstfruits of the ripened whole produce were waved to Him, in token of His gracious and almighty operation all around us.
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Fausset, Andrew R. Entry for 'Wave Offering'. Fausset's Bible Dictionary. https://www.studylight.org/dictionaries/eng/fbd/w/wave-offering.html. 1949.