SB 10.15.23

so ’ti-vīryo ’suro rāma
 he kṛṣṇa khara-rūpa-dhṛk
ātma-tulya-balair anyair
 jñātibhir bahubhir vṛtaḥ
Synonyms: 
saḥ — he; ati-vīryaḥ — very powerful; asuraḥ — a demon; rāma — O Rāma; he kṛṣṇa — O Kṛṣṇa; khara-rūpa — the form of an ass; dhṛk — assuming; ātma-tulya — equal to himself; balaiḥ — whose strength; anyaiḥ — with others; jñātibhiḥ — companions; bahubhiḥ — many; vṛtaḥ — surrounded.
Translation: 
O Rāma, O Kṛṣṇa! Dhenuka is a most powerful demon and has assumed the form of an ass. He is surrounded by many friends who have assumed a similar shape and who are just as powerful as he.