[300] Now at that time, the group-of-six bhikkhus (chabbaggiyā bhikkhū) [knew that] the Blessed One had allowed the teaching of Dhamma to a woman (mātugāma) in five or six sentences. Having had a man (purisaviggaha) lacking discernment sit down nearby, they taught Dhamma to a woman in more than five or six sentences. Those bhikkhus who were of few wishes … criticized, complained, and spread it about, saying: "How can the group-of-six bhikkhus, having had a man lacking discernment sit down nearby, teach Dhamma to a woman in more than five or six sentences?" Then those bhikkhus reported this matter to the Blessed One. … "Is it true, as they say, bhikkhus, that you, having had a man lacking discernment sit down nearby, teach Dhamma to a woman in more than five or six sentences?"
"It is true, Blessed One."
The Buddha, the Blessed One, rebuked them: "How can you, foolish men (moghapurisā), having had a man lacking discernment sit down nearby, teach Dhamma to a woman in more than five or six sentences? This, foolish men, is not conducive to the confidence of those without confidence … And thus, bhikkhus, you should recite this training rule:
"Whatever bhikkhu should teach Dhamma to a woman in more than five or six sentences, except with a discerning man present, there is an offense of expiation (pācittiya)."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.