Jewish Babylonian Talmud – Tracts Shekalmi.
p. 33 CHAPTER VIII. MISHNA: (a) All spittle a1 to be found in Jerusalem is considered clean, except such as is found at the upper market (for this place was secluded and those afflicted with venereal diseases were in the habit of going there). Such is the teaching of R. Meir. The sages say: In the middle