Rashi on Genesis 25:16/רש"י על בראשית כ״ה:ט״ז

1בחצריהם BY THEIR ENCLOSURES — Unwalled towns. In the Targum it is rendered by בפצחיהון because they are מפוצחים, which means “open”; similar in meaning to (Psalms 98:4) ‘‘Open your mouths (פצחו) and sing for joy”.