Rashi on Leviticus 7:34/רש"י על ויקרא ז׳:ל״ד

1תנופה … .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).