PārājikkaṇḍaTtiyapārājikasikkhābada

Vinayapiṭaka · Bhikkhu Vibhaṅga (1) · Vol. 1 · Section 220

[220] Now at that time a certain bhikkhu, thinking it was him, deprived him of life. Thinking it was him, he deprived another of life. Thinking it was another, he deprived him of life. Thinking it was another, he deprived another of life. Remorse arose in him … "Bhikkhu, you have committed an offense entailing expulsion (pārājika)."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places