[151] Now at that time the bhikkhus, thinking, "The recitation of the Pātimokkha (pātimokkhuddesa) has been allowed by the Blessed One," recited the Pātimokkha every day. They reported this matter to the Blessed One. "Bhikkhus, the Pātimokkha should not be recited every day. Whoever should recite it commits an offense of wrong-doing (dukkaṭa). Bhikkhus, I allow the Pātimokkha to be recited on the Uposatha day."
Now at that time the bhikkhus, thinking, "The recitation of the Pātimokkha on the Uposatha has been allowed by the Blessed One," recited the Pātimokkha three times a fortnight: on the fourteenth, on the fifteenth, and on the eighth day of the fortnight. They reported this matter to the Blessed One. "Bhikkhus, the Pātimokkha should not be recited three times a fortnight. Whoever should recite it commits an offense of wrong-doing. Bhikkhus, I allow the Pātimokkha to be recited once a fortnight, on the fourteenth or on the fifteenth."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.