ChU, 1, 3, 1.4 udyaṃs tamo bhayam apahanti /

ChU, 1, 3, 1.5 apahantā ha vai bhayasya tamaso bhavati ya evaṃ veda //

ChU, 7, 26, 2.11 tasmai mṛditakaṣāyāya tamasas pāraṃ darśayati bhagavān sanatkumāraḥ /