釋氏要覽 1.289

1.289

三衣葉上不㓨合處。謂之明孔。有云若田畦入水之竇。按根本百一羯磨。淨三藏云。西國三衣。並皆㓨合。唯東夏開而不縫。詳觀律檢。實無開法。

The unstitched places on the panels of the three robes are called clear apertures. Some say they are like the sluices where water enters the field ridges. According to the Mūlasarvāstivāda Ekottarakarma, the Tripiṭaka Master [Yi]jing states: "The three robes in the western countries are all stitched completely closed; only in China are they left open without sewing. Carefully examining the Vinaya texts, there is truly no method of leaving them open."