Srimad Bhagavatam Canto 10, Chapter 25, Text 03

SB 10.25.3

aho sri-mada-mahatmyam
 gopanam kananaukasam
krsnam martyam upasritya
 ye 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, Krsna, 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 Krsna, whom Indra considered to be martya, a mortal. This was certainly a gross miscalculation on Indra’s part.
Srimad Bhagavatam Canto 10, Chapter 25, Text 02
Srimad Bhagavatam Canto 10, Chapter 25, Text 04