'Wave breast' in the Bible

For, the wave-breast and the heave-shoulder, have I taken of the sons of Israel, out of their peace-offerings, - and have given them unto Aaron the priest and unto his sons as an age-abiding statute, from the sons of Israel.

And the wave-breast, and the heave-shoulder, shall ye eat in clean place, thou, and thy sons and thy daughters with thee, - for as thine by statute and thy sons by statute, have they been given, from among the peace-offerings of the sons of Israel.

The heave-shoulder and the wave-breast upon the altar-flames of the fat portions, shall they bring in, to wave as a wave-offering, before Yahweh, - so shall they be thine, and thy sons with thee, by an age-abiding statute, As Yahweh hath commanded.