Garudapurana 2.24.23

2.24.23

kartavyaḥ paramo yatnaḥ pātakasya vināśane /
anekabhavasambhūtaṃ pātakaṃ tu tridhā kṛtam //

Supreme effort must be made for the destruction of sin. / The sin accumulated across many births is threefold;