百論曰：劫初梵天王得七十二字，來化世間，世間皆不信，故吞七十字，唯二字留著於口之左右，即阿與漚也。故外道書之首，皆安此二字。阿者無，漚者有。謂一切諸法，不出有無之義，故安於經之首以表吉相。
Brahma obtained seventy-two words with which to save the world, but failing he swallowed seventy, leaving one at each side of his mouth 阿 and 漚 , i.e. 無 and 有 things are, things are not, being and non-being.
一七十二字 劫初，梵天王得七十二字來化世間，世間皆不信，故吞七十字，唯留二字於口之左右，即阿與漚。外道之書，以此二字安於卷首，阿者無，漚者有，謂一切諸法不出有無二義，故安之以表吉相。〔百論疏〕p148