Vinaya Pitaka - Monastic Rules
Bhikkhu Vibhanga - Sekhiya 60: Not to teach the dhamma to someone holding a weapon unless they are ill.
- Translated from the Pali by I.B. Horner.
… in Anāthapiṇḍika’s monastery. Now at that time the group of six monks taught dhamma to (someone) with a weapon in his hand … " …
"I will not teach dhamma to (someone) who has a weapon in his hand (and) who is not ill.’ is a training to be observed."
Weapon means: a long-bow, a cross-bow. Dhamma should not be taught to (someone) who has a weapon in his hand (and) who is not ill … if he is the first wrong-doer.
The Sixth Division: that on hissing
1 tena samayena buddho bhagavā sāvatthiyaṃ viharati jetavane anāthapiṇḍikassa ārāme. tena kho pana samayena chabbaggiyā bhikkhū āvudhapāṇissa dhammaṃ desenti … pe … .
2 "na āvudhapāṇissa agilānassa dhammaṃ desessāmīti sikkhā karaṇīyā"ti. (60:205)
4 na āvudhapāṇissa agilānassa dhammo desetabbo. yo anādariyaṃ paṭicca āvudhapāṇissa agilānassa dhammaṃ deseti, āpatti dukkaṭassa.