Bhagavad Gita 5.18 Chapter 5, Verse 18

विद्याविनयसंपन्ने ब्राह्मणे गवि हस्तिनि ।
शुनि चैव श्वपाके च पण्डिताः समदर्शिनः ॥५.१८॥

vidyāvinayasaṃpanne brāhmaṇe gavi hastini
śuni caiva śvapāke ca paṇḍitāḥ samadarśinaḥ

Meaning

The wise look with an equal eye on a learned and humble Brahmin, a cow, an elephant, a dog and an outcaste.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 5.18 (Chapter 5, The Yoga of Renunciation (Karma Sannyasa Yoga), Verse 18)