From:
Theravāda Vinaya Theravāda Collection on Monastic Law
Mahāvibhaṅga The Great Analysis
Sekhiyakaṇḍa The chapter on training
Pādukavagga The subchapter on shoes
62. Upāhanāruḷhasikkhāpada 62. The training rule on sandals
Tena samayena buddho bhagavā sāvatthiyaṁ viharati jetavane anāthapiṇḍikassa ārāme. At one time the Buddha was staying at Sāvatthī in the Jeta Grove, Anāthapiṇḍika’s Monastery.
Tena kho pana samayena chabbaggiyā bhikkhū upāhanāruḷhassa dhammaṁ desenti …pe…. At that time the monks from the group of six gave teachings to people wearing sandals. …
“Na upāhanāruḷhassa agilānassa dhammaṁ desessāmīti sikkhā karaṇīyā”ti. “‘I will not give a teaching to anyone wearing sandals who is not sick,’ this is how you should train.”
Na upāhanāruḷhassa agilānassa dhammo desetabbo. One should not give a teaching to anyone wearing sandals who is not sick.
Yo anādariyaṁ paṭicca akkantassa vā paṭimukkassa vā omukkassa vā agilānassa dhammaṁ deseti, āpatti dukkaṭassa. If a monk, out of disrespect, gives a teaching to someone who is not sick and who is standing on sandals, whose sandals are fastened, or whose sandals are loose, he commits an offense of wrong conduct.
Anāpatti—There is no offense:
asañcicca …pe… if it is unintentional;
ādikammikassāti. if he is the first offender.
Dutiyasikkhāpadaṁ niṭṭhitaṁ. The second training rule is finished.