Reference for Pesachim 225:9

אמר רב פפא כל אגב גביא בעי כל אשראי ספק אתי ספק לא אתי ודאתי מעות רעות נינהו

And to what extent? - Said Raba: Up to three se'ahs. R'Papa said: If I were not a beer manufacturer I would not have become wealthy. Others say, R'Hisda said: If I were not a beer manufacturer, I would not have become wealthy.

Jastrow

Jastrow