Vaishnava Dharmashastra 40.2

40.2

apātrīkaraṇaṃ kṛtvā taptakṛcchreṇa śudhyati
śītakṛcchreṇa vā bhūyo mahāsāṃtapanena vā //

He who has committed a crime rendering unworthy to receive alms, is purified by the penance Taptakrikkhra (in case he committed it knowingly), or by the penance Sîtakrikkhra (in case he did it unawares), or by the penance Mahâsântapana (in case it was committed) repeatedly.