O King, when the great hero Vrtrasura saw Indra, his enemy, the killer of his brother, standing before him with a thunderbolt in his hand, desiring to fight, Vrtrasura remembered how Indra had cruelly killed his brother

Expressions researched:
"O King, when the great hero Vrtrasura saw Indra, his enemy, the killer of his brother, standing before him with a thunderbolt in his hand, desiring to fight, Vrtrasura remembered how Indra had cruelly killed his brother"

Srimad-Bhagavatam

SB Canto 6

O King, when the great hero Vrtrasura saw Indra, his enemy, the killer of his brother, standing before him with a thunderbolt in his hand, desiring to fight, Vrtrasura remembered how Indra had cruelly killed his brother.

SB 6.11.13, Translation

O King, when the great hero Vṛtrāsura saw Indra, his enemy, the killer of his brother, standing before him with a thunderbolt in his hand, desiring to fight, Vṛtrāsura remembered how Indra had cruelly killed his brother. Thinking of Indra's sinful activities, he became mad with lamentation and forgetfulness. Laughing sarcastically, he spoke as follows.