瑜伽論記 6.428

6.428

次第乞食者，遠公云：凡愚貪味棄貧就富，二乘悲狹捨富從貧，大士之行離貪去狹不簡貧富，故名次第乞。然依此文，聲聞亦應不簡貧富次第而乞也。

As for 'begging alms in succession', Venerable Yuan says: ordinary foolish people crave flavors and abandon the poor to approach the rich; those of the two vehicles have narrow compassion and abandon the rich to follow the poor; the practice of the Great Beings departs from greed and leaves behind narrowness, not discriminating between poor and rich, hence it is called 'begging in succession'. However, according to this text, the Śrāvakas should likewise not discriminate between poor and rich and beg in succession.