CC Madhya 13.34

tabe mahāprabhu mane vicāra kariyā
cāri sampradāya dila gāyana bāṅṭiyā
Word for word: 
tabe — after this; mahāprabhu — Śrī Caitanya Mahāprabhu; mane — in the mind; vicāra kariyā — considering; cāri sampradāya — four parties; dila — gave; gāyana bāṅṭiyā — dividing the singers.
Translation: 
When the four parties were formed, Śrī Caitanya Mahāprabhu, after some consideration, divided the chanters.