Of kings like Śambara, Dvivida, Bāṇa, Mura, Balvala and many other demons, such as Dantavakra, some He killed Himself, and some He caused to be killed by others [Śrī Baladeva, etc.].
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
शम्बरं द्विविदं बाणं मुरं बल्वलमेव च । अन्यांश्च दन्तवक्त्रादीनवधीत्कांश्च घातयत्
śambaraṃ dvividaṃ bāṇaṃ muraṃ balvalameva ca | anyāṃśca dantavaktrādīnavadhītkāṃśca ghātayat
SB 3.3.11