Note 35 — II. OUR DUTIES. (continued 4)

The distance allowed is called ‏תחום שבת‎ “a Sabbath-journey,” and is 2000 cubits in every direction; it is reckoned from the outskirts of the place in which we live. If, however, a person desires to perform a mitsvah, such as milah, at a place distant about a double Sabbath-journey from his domicile, he may fix before Sabbath his abode for that day half-way between the two places, and then traverse on Sabbath the whole distance from the one place to the other. This change of abode is called erubhe thechumin, “combination of two Sabbath-journeys into one,” by changing the centre from which they are measured. ↑