'Wave offerings' in the Bible

You are to make the descendants of Levi stand in the presence of Aaron and his sons. Then you are to wave them as wave offerings to the LORD.

"After this, the descendants of Levi are to come to serve at the appointed place of meeting, after you have purified them and presented them as wave offerings,

The descendants of Levi therefore purified themselves, washed their clothes, and then Aaron presented them as wave offerings to the LORD. Aaron provided atonement for them to purify them.

The raised offering and wave offerings presented by the Israelis are yours, too. I've given them to you, to your sons, and to your daughters as a prescribed apportionment forever. Everyone who is clean in your household may eat it.