One verse

Srimad Bhagavatam 10.1.46

10.1.46

श्रीशुक उवाच एवं स सामभिर्भेदैर्बोध्यमानोऽपि दारुण: । न न्यवर्तत कौरव्य पुरुषादाननुव्रत: ॥ ४६ ॥

śrī-śuka uvāca evaṁ sa sāmabhir bhedair bodhyamāno ’pi dāruṇaḥ na nyavartata kauravya puruṣādān anuvrataḥ

śrī-śukaḥ uvāca
Śrī Śukadeva Gosvāmī said
evam
in this way
saḥ
he (Kaṁsa)
sāmabhiḥ
by attempts to pacify him (Kaṁsa)
bhedaiḥ
by moral instructions that one should not be cruel to anyone else
bodhyamānaḥ api
even being pacified
dāruṇaḥ
he who was the most fiercely cruel
na nyavartata
could not be stopped (from the grievous act)
kauravya
O Mahārāja Parīkṣit
puruṣa-adān
the Rākṣasas, man-eaters
anuvrataḥ
following in their footsteps

Śukadeva Gosvāmī continued: O best of the Kuru dynasty, Kaṁsa was fiercely cruel and was actually a follower of the Rākṣasas. Therefore he could be neither pacified nor terrified by the good instructions given by Vasudeva. He did not care about the results of sinful activities, either in this life or in the next.