I've seen this quote floating around the internet, attributed to St. Aquinas:
"It would be licit, according to custom, to hold the Jєωs in perpetual servitude for their crime against Our Lord."
It appears this quote is a misquote inspired by
De Regimine Judaeorum, where St. Aquinas writes:
"the Jєωs by reason of their fault are sentenced to perpetual servitude".
But St. Aquinas is not saying here that Jєωs should be subjected to chattel slavery, but that Jєωs who acquire wealth through usury should have their assets stripped from them by the state.
However, I read Wikipedia's
Christianity and antisemitism page (and would appreciate a better source if anyone can help) that St. Augustine favored "enslavement of Jєωs to Catholics". And St. Chrysostom "went so far to say that because Jєωs rejected the Christian God in human flesh, Christ, they therefore deserved to be killed."
I'd like to think that this is true of St. Augustine and St. Chrysostom.