Commentary for Berakhot 84:5

רב יצחק בר יוסף איקלע לבי אביי בי"ט חזייה דבריך אכל כסא וכסא א"ל לא סבר לה מר להא דריב"ל א"ל נמלך אנא

Rab Isaac b. Joseph visited the house of Abbai on a Festival and noticed that he pronounced the benediction over each cup. He said to him, "Does not the master agree with the opinion of R. Joshua b. Levi ?" He replied, "It only just occurred to me."

Abraham Cohen Footnotes to the English Translation of Masechet Berakhot