Reference for Kiddushin 62:7

רב אסי הוה ליה ההיא אמא זקינה אמרה לי' בעינא תכשיטין עבד לה בעינא גברא נייעין לך בעינא גברא דשפיר כותך שבקה ואזל לארעא דישראל

R'Johanan's father died when his mother conceived him, and his mother died when she bore him. And Abaye was likewise. But that is not so, for Abaye said, my Mother told me. ! - That was his foster-mother.

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