Bhagavad Gita 5.18

5.18 Sages look with an eal eye on a Brahmana endowed with learning and humility, on a cow, on an elephant, and even on a dog and an outcaste.

The humble sages, by virtue of true knowledge, see with equal vision a learned and gentle brāhmaṇa, a cow, an elephant, a dog and a dog-eater [outcaste].