Buddhist Dictionary of Pali Proper Names by G P Malalasekera
āvaranatā sutta
Āvaranatā Sutta:Six conditions which make it impossible,even if he hear the dhamma,for a man to enter on the Path (niyāmam okkainitum) which consists of good deeds:
killing father, mother or arahant, willingly causing physical hurt to the Buddha, bringing dissension among the monks, being foolish, half-witted, deaf and dumb.A.iii.436-7.