sn12.17:8.1 “Sace, bhante, aññatitthiyapubbo imasmiṁ dhammavinaye ākaṅkhati pabbajjaṁ, ākaṅkhati upasampadaṁ, cattāro māse parivasati. Catunnaṁ māsānaṁ accayena āraddhacittā bhikkhū pabbājenti upasampādenti bhikkhubhāvāya. Ahaṁ cattāri vassāni parivasissāmi, catunnaṁ vassānaṁ accayena āraddhacittā bhikkhū pabbājentu upasampādentu bhikkhubhāvāyā”ti.