SB 10.19.9

kṛṣṇa kṛṣṇa mahā-vīra
 he rāmāmogha vikrama
dāvāgninā dahyamānān
 prapannāṁs trātum arhathaḥ
Word for word: 
kṛṣṇa kṛṣṇa — O Kṛṣṇa, Kṛṣṇa; mahā-vīra — O most powerful one; he rāma — O Rāma; amogha-vikrama — You whose prowess is never thwarted; dāva-agninā — by the forest fire; dahyamānān — who are being burned; prapannān — who are surrendered; trātum arhathaḥ — please save.
Translation: 
[The cowherd boys said:] O Kṛṣṇa! Kṛṣṇa! Most powerful one! O Rāma! You whose prowess never fails! Please save Your devotees, who are about to be burned by this forest fire and have come to take shelter of You!