To break the spell of thirteen at table, all should rise together, otherwise the first up (or, as some say, the last down) dies inside a twelvemonth.
New England.

To break the spell of thirteen at table, all should rise together, otherwise the first up (or, as some say, the last down) dies inside a twelvemonth.
Source: Current Superstitions (1896), entry 1236.
Fanny D. Bergen, editor.
Modern normalized navigation; the historical attribution above remains unchanged.