Aaron waved the breasts and the right thigh as a wave offering before Yahweh, just as Moses had commanded.
In context
19They gave him the fat portions from the ox and the ram — the fat tail, the fat covering the inner parts, the kidneys, and the long lobe of the liver — 20and placed them on the breasts, and he burned the fat portions on the altar. 21Aaron waved the breasts and the right thigh as a wave offering before Yahweh, just as Moses had commanded. 22Then Aaron lifted his hands toward the people and blessed them. Having offered the sin offering, the burnt offering, and the peace offering, he stepped down. 23Moses and Aaron went into the tent of meeting, and when they came out, they blessed the people, and the glory of Yahweh appeared to all the people.