Srimad Bhagavatam Canto 06, Chapter 01, Text 07

SB 6.1.7

sri-suka uvaca
na ced ihaivapacitim yathamhasah
 krtasya kuryan mana-ukta-panibhih
dhruvam sa vai pretya narakan upaiti
 ye kirtita me bhavatas tigma-yatanah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Sukadeva Gosvami replied: My dear King, if before one’s next death whatever impious acts one has performed in this life with his mind, words and body are not counteracted through proper atonement according to the description of the Manu-samhita and other dharma-sastras, one will certainly enter the hellish planets after death and undergo terrible suffering, as I have previously described to you.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Srila Visvanatha Cakravarti Thakura mentions that although Maharaja Pariksit was a pure devotee, Sukadeva Gosvami did not immediately speak to him about the strength of devotional service. As stated in Bhagavad-gita (14.26):
mam ca yo ’vyabhicarena
 bhakti-yogena sevate
sa gunan samatityaitan
 brahma-bhuyaya kalpate
Devotional service is so strong that if one fully surrenders to Krsna and takes fully to His devotional service, the reactions of his sinful life immediately stop.
Elsewhere in the Gita (18.66), Lord Krsna urges that one give up all other duties and surrender to Him, and He promises, aham tvam sarva-papebhyo moksayisyami: “I shall free you from all sinful reactions and give you liberation.” Therefore in response to the inquiries of Pariksit Maharaja, Sukadeva Gosvami, his guru, could have immediately explained the principle of bhakti, but to test Pariksit Maharaja’s intelligence, he first prescribed atonement according to karma-kanda, the path of fruitive activities. For karma-kanda there are eighty authorized scriptures, such as Manu-samhita, which are known as dharma-sastras. In these scriptures one is advised to counteract his sinful acts by performing other types of fruitive action. This was the path first recommended by Sukadeva Gosvami to Maharaja Pariksit, and actually it is a fact that one who does not take to devotional service must follow the decision of these scriptures by performing pious acts to counteract his impious acts. This is known as atonement.
Srimad Bhagavatam Canto 06, Chapter 01, Text 06
Srimad Bhagavatam Canto 06, Chapter 01, Text 08