Kaṁsa begged, “My dear sister and brother-in-law, please be merciful to such a poor-hearted person as me, since both of you are saintly persons. Please excuse my atrocities.” Having said this, Kaṁsa fell at the feet of Vasudeva and Devakī, his eyes full of tears of regret.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
क्षमध्वं मम दौरात्म्यं साधवो दीनवत्सलाः । इत्युक्त्वाश्रुमुखः पादौ श्यालः स्वस्रोरथाग्रहीत्
kṣamadhvaṃ mama daurātmyaṃ sādhavo dīnavatsalāḥ | ityuktvāśrumukhaḥ pādau śyālaḥ svasrorathāgrahīt
SB 10.4.23