When Vṛtrāsura is killed because of My spiritual strength, you will regain your strength, weapons and wealth. Thus there will be all good fortune for all of you. Although Vṛtrāsura can destroy all the three worlds, do not fear that he will harm you. He is also a devotee and will never be envious of you.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तस्मिन् विनिहते यूयं तेजोऽस्त्रायुधसम्पदः । भूयः प्राप्स्यथ भद्रं वो न हिंसन्ति च मत्परान्
tasmin vinihate yūyaṃ tejo'strāyudhasampadaḥ | bhūyaḥ prāpsyatha bhadraṃ vo na hiṃsanti ca matparān
SB 6.9.55