Bhagavatapurana 6.16.14

6.16.14

bālaghnyo vrīḍitāstatra bālahatyāhataprabhāḥ /
bālahatyāvrataṃ cerurbrāhmaṇairyan nirūpitam /
yamunāyāṃ mahārāja smarantyo dvijabhāṣitam //

14. There the murderers of the child were ashamed and lost their splendour by force of their sin of infanticide; then they made a penance as directed by the Brahmins at the Yamuna, remembering, O great king, what the Brahmins expounded.