Reference for Keritot 44:23

תחתון הוא דגמר מעליון לאשם בכסף שקלים

- Although it is written, 'This is the law of the guilt-offering', there is still need fo phrase, 'and if any one', the 'and' implying an addition to the foregoing, and thereby deriving the law below from the law above.

Jastrow