瑜伽論記 18.556

18.556

譬喻事者，謂廣長眾多譬喻等者，如說一譬無量因緣，名長譬喻，如火宅喻等是也。

Regarding 'parable matters': referring to extensive, long, and numerous parables, it means that one metaphor contains immeasurable conditions; this is called a long parable, such as the parable of the burning house and the like.