俱舍論記 18.50

18.50

「若爾喻說至殺阿羅漢」者，引經為難。若爾，《譬喻經》說當云何通？佛告始欠持：「汝已造二逆，所謂害父、殺阿羅漢。」昔佛在世，南印度國有一國王，以國委付太子始欠持，往室羅筏歸佛出家，得阿羅漢果。太子無道，專行非法暴亂百姓。有舊老臣至父王所具陳上事，請王還國示誨太子。父王許諾請遂還本國。太子佞臣恐被誅戮，侫太子言：「父王欲來奪太子位，請遣一使在路而殺。」太子納此侫言，遂遣使殺。父王知業因緣應合子殺，甘心受死。佛知斯事，遣弟子去告彼太子始欠持言：「汝已造二逆，所謂害父、殺阿羅漢。」始欠持，此云頂髻。

Regarding "If so, how can the statement in the parable [...] 'killing an arhat'?": this cites a sūtra to raise an objection. If so, how is the statement in the *Dṛṣṭānta-sūtra* to be reconciled? The Buddha told Śikhaṇḍin: "You have already committed two anantaryas, namely patricide and killing an arhat." Formerly, when the Buddha was in the world, there was a king in South India who entrusted the kingdom to Crown Prince Śikhaṇḍin and went to Śrāvastī to take refuge in the Buddha and go forth, attaining the fruit of arhatship. The Crown Prince was unprincipled, acting exclusively contrary to Dharma and tyrannizing the common people. An old, former minister went to where the father king was and fully related the matter above, requesting the king to return to the kingdom to instruct the Crown Prince. The father king consented to the request and thereupon returned to his native kingdom. Sycophantic ministers of the Crown Prince, fearing execution, flattered the Crown Prince, saying: "The father king wishes to come and usurp the Crown Prince's throne; please dispatch an emissary to kill him on the road." The Crown Prince accepted these sycophantic words and thereupon sent an emissary to kill him. The father king, knowing the karmic conditions that he was fated to be killed by his son, willingly accepted death. The Buddha, knowing this matter, sent a disciple to tell Crown Prince Śikhaṇḍin: "You have already committed two anantaryas, namely patricide and killing an arhat." "Śikhaṇḍin" translates here as "Topknot."