dvijais tamasi pātitaḥ

etat-this; veditum-to know; icchamah-desire; sarve-all; eva-certainly; vayam-we; mune-O great sage; bhagavat-nindaya-because of blaspheming the Lord; venah-Vena, the father of Prthu Maharaja; dvijaih-by the brahmanas; tamasi-into hell; patitah-was thrown.