Reference for Zevachim 16:12

הא תנא דבי רבי ישמעאל בכללי ופרטי דריש כי האי גוונא

- If it were written, 'for peace-offering and a sacrifice' [it would be] as you say; since however it is written, 'for a sacrifice of peace-offerings', [its implication is whatever purpose it is slaughtered, let it be a peace-offering.

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