Śrīmad-Bhāgavatam · Text 6.1.8
Who is speaking and story frame
तस्मात्पुरैवाश्विह पापनिष्कृतौ
यतेत मृत्योरविपद्यतात्मना ।
दोषस्य दृष्ट्वा गुरुलाघवं यथा
भिषक् चिकित्सेत रुजां निदानवित् ॥ ८ ॥
tasmāt puraivāśv iha pāpa-niṣkṛtau
yateta mṛtyor avipadyatātmanā
doṣasya dṛṣṭvā guru-lāghavaṁ yathā
bhiṣak cikitseta rujāṁ nidānavit
Therefore, before one’s next death comes, as long as one’s body is strong enough, one should quickly adopt the process of atonement according to śāstra; otherwise one’s time will be lost, and the reactions of his sins will increase. As an expert physician diagnoses and treats a disease according to its gravity, one should undergo atonement according to the severity of one’s sins.
Read Śrīla Prabhupāda's purport on Vedabase.io