Related for Avodah Zarah 60:1
מכאן ואילך אין בו משום גילוי ואין בו משום יין נסך ונהרדעי אמרי אפי' לבתר תלתא יומי חיישינן משום גילוי מ"ט זימנין מיקרי שתי
from this point and onwards, it is not made unfit by being left uncovered nor it is suspected of idolatrous use. The Nehardeans say that even after three days we must be concerned about it being left uncovered. What is the reason? Occasionally even such wine is drunk [by snakes].
Tosefta Terumot
It so happened that a dead snake was found in a wine cistern and they came and asked Rabbi Yehudah ben Bava, and he [ruled that] the cistern remained permissible [as the] wine was fermenting. As long as it is still fermenting, it is not subject to the prohibitions of exposed liquids (Sanh. 70a:10). And how long does it ferment? Three days.
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