Jewish Babylonian Talmud – Tracts Erubin – Regulations concerning the erubin of courts and partnerships.
p. 145 CHAPTER VI. REGULATIONS CONCERNING THE ERUBIN OF COURTS AND PARTNERSHIPS. MISHNA: To one who dwells in the same court with a Gentile, or with one who does not acknowledge the laws of Erub, the latter prove a bar (to his carrying in the court). R. Eliezer ben Jacob, however, said: "At no time can such a