Bartenura on Mishnah Eruvin
- 1.5.3
if it has in its circumference: Which is to say, what is the round measurement required to render [the beam] proper? Anything that has in its circumference three handbreadths, which requires a string of three handbreadths to encircle it around, it is known that it has a width (diameter) of one handbreadth, if you divide [it]. As so do we find with the basin that Shlomo made (II Chronicles 4:2), "ten ells from its edge to its edge and five ells of height and a line of thirty ells encircling it around." Hence for every ell in width (diameter), there are three ells in circumference.
- 10.13.5
They may tie up a string - the string of a ‘kinor’ played by the Levites [in the Temple] which snapped on the Sabbath.
Sefaria Community Translation. Via Sefaria (sefaria.org), Sefaria-Export. Version source: https://www.sefaria.org Licence: CC0. Source.