折疑論 3.15

3.15

夏則居橧巢（橧音曾。鳥巢也。上古聖人無屋。夏則居鳥巢）。

in summer lived in nests of sticks ("橧" is pronounced like "曾"; it means a bird's nest. The sages of high antiquity had no houses; in summer they lived in nests of sticks);