Having uprooted all relationships with his sister because of intense selfishness, Kaṁsa, who was sitting on his knees, grasped the newborn child by the legs and tried to dash her against the surface of a stone.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तां गृहीत्वा चरणयोर्जातमात्रां स्वसुः सुताम् । अपोथयच्छिलापृष्ठे स्वार्थोन्मूलितसौहृदः
tāṃ gṛhītvā caraṇayorjātamātrāṃ svasuḥ sutām | apothayacchilāpṛṣṭhe svārthonmūlitasauhṛdaḥ
SB 10.4.8