廣弘明集 9.46

9.46

化胡經云。老化胡。王不受其教。老子曰。王若不信。吾南入天竺化諸國。其道大興。自此已南無尊於佛者。胡王猶不信受曰。若南化天竺。吾當稽首稱南無佛。又流沙塞有加夷國。常為劫盜。胡王患之。使男子守塞常憂。因號男為憂婆塞。女子又畏加夷所掠。兼憂其夫為夷所困。乃因號憂婆夷。

The Huahu jing says: When Laozi converted the barbarians, the king would not accept his teachings. Laozi said, "If the king does not believe, I shall go south into India to convert the various kingdoms, and their Dao will flourish greatly. South of this, none will be more revered than the Buddha." The barbarian king still did not believe or accept it, saying, "If you go south to convert India, I will bow my head and chant 'Namo Buddhāya' (South-none Buddha)." Furthermore, at the Quick Sands pass there was the kingdom of Jiayi, which constantly committed robbery and plunder. The barbarian king, troubled by them, made men guard the pass with constant worry (you); thus men were named youpose (upāsaka). Women also feared being plundered by the Jiayi, and moreover worried about their husbands being beleaguered by the barbarians (yi); thus they were named youpoyi (upāsikā).