大般涅槃經疏 18.27

18.27

「善男子若佛初出」下，第三通明一切佛法，有六雙對辨：初解義不解義、二有檀越無檀越、三為利不為利、四起爭不起爭、五說過不說過、六種種說不種種說。

From "Good son, when a buddha first appears" onwards is the third part, generally explaining the Buddha-Dharma of all buddhas, having six pairs of contrastive differentiations: first, understanding the meaning versus not understanding the meaning; second, having dānapatis versus lacking dānapatis; third, acting for profit versus not acting for profit; fourth, giving rise to disputes versus not giving rise to disputes; fifth, speaking of faults versus not speaking of faults; sixth, preaching in various ways versus not preaching in various ways.