Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 3

Sanskrit:

अहो श्रीमदमाहात्म्यं गोपानां काननौकसाम् । कृष्णं मर्त्यमुपाश्रित्य ये चक्रुर्देवहेलनम् ॥ ३ ॥

ITRANS:

aho śrī-mada-māhātmyaṁgopānāṁ kānanaukasāmkṛṣṇaṁ martyam upāśrityaye cakrur deva-helanam

Translation:

[Indra said:] Just see how these cowherd men living in the forest have become so greatly intoxicated by their prosperity! They have surrendered to an ordinary human being, Kṛṣṇa, and thus they have offended the gods.

Purport:

Of course, Indra was really saying that the cowherd men had offended him, Indra, by taking shelter of Kṛṣṇa, whom Indra considered to be martya, a mortal. This was certainly a gross miscalculation on Indra’s part.