אַל־תַּ֭סֵּג גְּב֣וּל עוֹלָ֑ם אֲשֶׁ֖ר עָשׂ֣וּ אֲבוֹתֶֽיךָ׃
不可挪移你祖先所立的古時地界。
Rashi
Do not remove an ancient boundary Do not turn away from the custom of your forefathers. Our Sages of blessed memory said: If one places a basket under a vine at the time of vintage so that the fallen grapes should fall into it, concerning this was stated: “Do not remove an ancient boundary, etc.” remove Heb. תסג, as in (Ps. 129:5) “and shall draw backwards (ויסגו).”