Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 38

Sanskrit:

इति सञ्चिन्त्य दाशार्हो वत्सान्सवयसानपि ।सर्वानाचष्ट वैकुण्ठं चक्षुषा वयुनेन स: ॥ ३८ ॥

ITRANS:

iti sañcintya dāśārhovatsān sa-vayasān apisarvān ācaṣṭa vaikuṇṭhaṁcakṣuṣā vayunena saḥ

Translation:

Thinking in this way, Lord Balarāma was able to see, with the eye of transcendental knowledge, that all these calves and Kṛṣṇa’s friends were expansions of the form of Śrī Kṛṣṇa.

Purport:

Every individual is different. There are even differences between twin brothers. Yet when Kṛṣṇa expanded Himself as the boys and calves, each boy and each calf appeared in its own original feature, with the same individual way of acting, the same tendencies, the same color, the same dress, and so on, for Kṛṣṇa manifested Himself with all these differences. This was Kṛṣṇa’s opulence.