Lord Kṛṣṇa lived both in Vṛndāvana and in Mathurā. What did He do there? Why did He kill Kaṁsa, His mother’s brother? Such killing is not at all sanctioned in the śāstras.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
व्रजे वसन् किमकरोन्मधुपुर्यां च केशवः । भ्रातरं चावधीत्कंसं मातुरद्धातदर्हणम्
vraje vasan kimakaronmadhupuryāṃ ca keśavaḥ | bhrātaraṃ cāvadhītkaṃsaṃ māturaddhātadarhaṇam
SB 10.1.10