Reference for Avodah Zarah 92:9

התם ר' אליעזר גמריה ואייקר ליה תלמודא ואתא ר"ע לאדכוריה והיינו דא"ל רבי אל תכפירני בשעת הדין כך מקובל אני ממך הזאה שבות ואינה דוחה את השבת

In that case R. Eliezer had himself taught him, but had forgotten his own teaching; so R. Akiva came and reminded him of it. That is why [R. Akiba said to him, ‘My master! Do not deny me in the time of judgment! Thus have I received the teaching from you: Sprinkling [is prohibited] on account of shevut and it does not supersede Shabbat.”

Jastrow