Vinaya Pitaka - Monastic Rules
Bhikkhu Vibhanga - Sekhiya 67: Not to teach the dhamma to someone whose head is covered 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 his head muffled up … " …
‘I will not teach dhamma to (someone) with his head muffled up (and) who is not ill,’ is a training to be observed."
Head muffled up means: it is so called if he is dressed, including his head, in his upper robe.
Dhamma should not be taught to (someone) with his head muffled up (and) who is not ill. Whoever out of disrespect should teach dhamma to (someone) with his head muffled up (and) who is not ill, there is an offence of wrong-doing.
There is no offence if it is unintentional, if he is not thinking, if he does not know, if he is ill, if he shows the head having caused it to be uncovered, if he is mad, if he is the first wrong-doer.
1 tena samayena buddho bhagavā sāvatthiyaṃ viharati jetavane anāthapiṇḍikassa ārāme. tena kho pana samayena chabbaggiyā bhikkhū oguṇṭhitasīsassa dhammaṃ desenti … pe … .
2 "na oguṇṭhitasīsassa agilānassa dhammaṃ desessāmīti sikkhā karaṇīyā"ti. (67:212)
3 oguṇṭhitasīso nāma sasīsaṃ pāruto vuccati.
4 na oguṇṭhitasīsassa agilānassa dhammo desetabbo. yo anādariyaṃ paṭicca oguṇṭhitasīsassa agilānassa dhammaṃ deseti, āpatti dukkaṭassa.
5 anāpatti— asañcicca, assatiyā, ajānantassa, gilānassa, sīsaṃ vivarāpetvā deseti, āpadāsu, ummattakassa, ādikammikassāti.