While Nanda Mahārāja was returning to Gokula, the same fierce Pūtanā whom Kaṁsa had previously engaged to kill babies was wandering about in the towns, cities and villages, doing her nefarious duty.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कंसेन प्रहिता घोरा पूतना बालघातिनी । शिशूंश्चचार निघ्नन्ती पुरग्रामव्रजादिषु
kaṃsena prahitā ghorā pūtanā bālaghātinī | śiśūṃścacāra nighnantī puragrāmavrajādiṣu
SB 10.6.2