法華經義記 1.62

1.62

「劫賓那」者，亦是外國語，此間翻言坊宿。正言此人在僧坊中宿，如來知其根熟，仍化作老比丘與同共宿，即於爾夜化令得道，故言坊宿也。又解言：「此人是劫賓國人，從國受名。」前解必然，後未必爾也。

"Kaphina" is also a foreign word, translated here as "lodging in the quarters". It precisely means that this person lodged in the monastic quarters. The Tathāgata, knowing that his faculties were mature, transformed into an old monk and lodged together with him, and on that very night converted him, causing him to attain the path; hence he is called "lodging in the quarters". Another explanation says: "This person was a native of the country of Kaphina, and took his name from the country." The former explanation is certain, while the latter is not necessarily so.