פירוש על ויקרא 7:34

תנופה … .תרומה WAVE [BREAD AND] HEAVE [SHOULDER] — This implies that he (the priest) moved them to and fro in a horizontally direction (תנופה) and moves them up and down (תרומה) (Sifra, Tzav, Chapter 16 3; cf. Rashi on Exodus 29:27 and Note thereon).

He moves them. [Rashi knows this] because it is written (Shemos 29:27): “[Sanctify the breast of the wave-offering and the shoulder of the terumoh-offering] which were [the] waved and uplifted [parts].” The meaning of תנופה is waving to and fro, and תרומה is an expression denoting lifting up, and as a matter of course lowering.