Jastrow: חַס

חַס m. (חוּס) sparing, forbearance, only (adverbial) חַס וְשָׁלוֹם forbearance and peace!, God forfend!, don’t say that! Eduy. V, 6 ח׳ וש׳ שעקביא וכ׳ God forbid (to think) that ʿAkabia was excommunicated! Sabb. 138ᵇ ח׳ וש׳ שתשתכח וכ׳ God forbid (to entertain the idea) that the Law will be forgotten &c. B. Mets. 85ᵇ ח׳ וש׳ אי וכ׳ if, which God forfend, the Law should be forgotten &c.—Y. Pes. VI, 33ᵃ bot. (in Chald. phraseology) ח׳ וש׳ דהוה בעי לה God forbid (to think) that he would have done it!; a. v. fr.