Reference for Kiddushin 142:2

אמר רב יוסף כל שסיחתו בבבל משיאין לו אשה והאידנא דאיכא רמאי חיישינן

Ze'iri was evading R'Johanan, who was urging him, 'Marry my daughter.'<span class="x" onmousemove="('comment',' Ze'iri being a Babylonian, whilst R. Johanan was only a Palestinian, he did not wish to marry his daughter, since the former are of purer birth.');">³</span> One day they were travelling on a road, when they came to a pool of water. Thereupon he placed R'Johanan on his shoulder and carried him across.

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