Reference for Menachot 122:4

אמר רבא הואיל ופתח בו הכתוב תחלה רב נחמן בר יצחק אמר הואיל ורב גבריה

You say that it refers to the wavin but perhaps it means literally 'setting it down!' As it has already said, And set it down, setting down [in the literal sense] has already been indicated. What then is the meaning of, 'And thou shalt set it down'?

Jastrow