Srimad Bhagavatam Canto 06, Chapter 12, Text 04

SB 6.12.4

chinnaika-bahuh parighena vrtrah
 samrabdha asadya grhita-vajram
hanau tatadendram athamarebham
 vajram ca hastan nyapatan maghonah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Although one of his arms was severed from his body, Vrtrasura angrily approached King Indra and struck him on the jaw with an iron mace. He also struck the elephant that carried Indra. Thus Indra dropped the thunderbolt from his hand.
Srimad Bhagavatam Canto 06, Chapter 12, Text 03
Srimad Bhagavatam Canto 06, Chapter 12, Text 05