sn12.17:7.1 “Yo kho, kassapa, aññatitthiyapubbo imasmiṁ dhammavinaye ākaṅkhati pabbajjaṁ, ākaṅkhati upasampadaṁ, so cattāro māse parivasati. Catunnaṁ māsānaṁ accayena āraddhacittā bhikkhū pabbājenti upasampādenti bhikkhubhāvāya.