'Wave breast' in the Bible

For the wave breast and the heave shoulder have I taken of the children of Israel from off the sacrifices of their peace offerings, and have given them unto Aaron the priest and unto his sons by a statute forever from among the children of Israel.

And the wave breast and heave shoulder shall you eat in a clean place; you, and your sons, and your daughters with you: for they are your due, and your sons' due, which are given out of the sacrifices of peace offerings of the children of Israel.

The heave shoulder and the wave breast shall they bring with the offerings made by fire of the fat, to wave it for a wave offering before the LORD; and it shall be yours, and your sons' with you, by a statute forever; as the LORD has commanded.