[862] Origin at Sāvatthī. Now at that time the group-of-six bhikkhus (chabbaggiyā) taught the Dhamma to a person who had mounted footgear (pādukā) … "I shall not teach the Dhamma to one who has mounted footgear and who is not sick" — thus is the training to be undertaken.
The Dhamma is not to be taught to one who has mounted footgear and who is not sick. Whatever bhikkhu, out of disrespect, teaches the Dhamma to one who is not sick and who has stepped onto them, or has them fastened on, or has them slipped on loosely, commits an offense of wrong-doing (dukkaṭa).
There is no offense: if it is unintentional; if it is done through absent-mindedness; if he does not know; if the person is sick; in emergencies; if he is insane; if he is the first offender (ādikammika).
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.