SB 10.5.4

kālena — by due course of time (the land and other material things become purified); snāna-śaucābhyām — by bathing (the body becomes purified) and by cleansing (unclean things become purified); saṁskāraiḥ — by purificatory processes (birth becomes purified); tapasā — by austerity (the senses become purified); ijyayā — by worship (the brāhmaṇas become purified); śudhyanti — become purified; dānaiḥ — by charity (wealth becomes purified); santuṣṭyā — by satisfaction (the mind becomes purified); dravyāṇi — all material possessions, such as cows, land and gold; ātmā — the soul (becomes purified); ātma-vidyayā — by self-realization.