Reference for Pesachim 224:3

ארבעה דברים צוה רבינו הקדוש את בניו אל תדור בשכנציב משום דליצני הוו ומשכו לך בליצנותא

command his children: Do not dwell in Shekanzib,<span class="x" onmousemove="('comment',' A town in Babylonia, on the cast side of the Tigris; v. Obermeyer, Landschaft, pp. 190f. It is there (p. 191, n. 4) pointed out, however, that R. Judah, a Palestinian, would have had no occasion to warn his children against living in a town in Babylonia, nor could he have known the character of its inhabitants well enough to justify this warning; hence it is conjectured that 'Raba' should be read here instead.');">⁵</span> because [its inhabitants] are scoffers and will corrupt you to disbelief. And do not sit upon the bed of a Syrian woman.

Jastrow

Jastrow