The venerable Upāli asked the Blessed Buddha, “Reverend, if a person who caused a schism among the Tathāgata’s saṅgha disciples in a previous ordination career again wants monkhood, to go forth and be ordained in the well-proclaimed Dharma and Vinaya, should his going forth be allowed or not?”

“Upāli, his going forth should not be allowed. Therefore, if someone wishing to go forth approaches any of you, you should ask, ‘You have not caused a schism in the saṅgha, have you?’ If you allow going forth without asking this, a breach occurs.”