法華經義記 4.63

4.63

「是時諸子各乘大車，得未曾有，非本所望」，此是第九諸子得大車故歡喜譬，此即譬上〈方便品〉中第九「菩薩聞是法疑網皆已除，千二百羅漢悉亦當作佛」，明三乘人受行大乘義也。

"At that time, each of the sons rode upon a great cart, having gained what they had never had before, which was beyond their original hopes": this is the ninth [parable], the parable of the sons rejoicing because they obtained the great cart. This corresponds above to the ninth [section] in the "Expedient Means" chapter: "The bodhisattvas, hearing this Dharma, / Have had all their webs of doubt removed; / And the twelve hundred arhats / Shall all likewise become Buddhas"—clarifying the meaning of the practitioners of the three vehicles receiving and practicing the Great Vehicle.