SB 7.10.60

siddhāmṛta-rasa-spṛṣṭā
 vajra-sārā mahaujasaḥ
uttasthur megha-dalanā
 vaidyutā iva vahnayaḥ
Word for word: 
siddha-amṛta-rasa-spṛṣṭāḥ — the demons, thus being touched by the powerful mystic nectarean liquid; vajra-sārāḥ — their bodies becoming invincible to thunderbolts; mahā-ojasaḥ — being extremely strong; uttasthuḥ — again got up; megha-dalanāḥ — that which goes through the clouds; vaidyutāḥ — lightning (which penetrates the clouds); iva — like; vahnayaḥ — fiery.
Translation: 
When the dead bodies of the demons came in touch with the nectar, their bodies became invincible to thunderbolts. Endowed with great strength, they got up like lightning penetrating clouds.