首楞嚴義疏注經 5.233

5.233

周利盤特迦，云蛇奴，於路所生，或云繼道。性多愚鈍，過去為大法師，善解經論，有徒五百，祕悋佛法，不肯教人，後生暗鈍，以宿善故遇佛出家，五百比丘同教一偈，經九十日不得成就。為治散亂，教數息也。

Cūḍapanthaka is translated as 'Snake Slave', born on a road, or translated as 'Born on the Path'. He was by nature exceedingly dull. In the past he was a great Dharma master who thoroughly understood sūtras and treatises and had five hundred disciples, but he was stingy with the Buddha-Dharma and unwilling to teach others. Consequently he was born dull and dim. Due to past wholesome roots he encountered the Buddha and left the household life; five hundred monks together taught him a single verse, yet over ninety days he could not master it. To remedy his distraction, the Buddha taught him breath-counting.