As Ravana and Kamsa was thinking of Krsna as enemy, similarly, if we think of Krsna that “He’ll wash my sinful activities,” that means you are thinking like Ravana and Kamsa. Krsna should be thought favorably. Anukulyena krsnanusilanam [Cc Madhya 19.167].

Na pratikulyena. No. You cannot think of Krsna and commit sinful life at the same time. That is pratikula. Krsna does not want that you shall remain sinful, because you cannot approach Krsna without being free from sinful activities. Yesam anta-gatam papam [Bg 7.28].

Krsna is pavitra, paramam. Apapa-viddham. These are the description. Krsna is the Supreme Pure. You cannot approach the Supreme Pure being sinful, and make Krsna your order-supplier, that you go on committing sinful life and Krsna will wash it. Krsna washes it — once, twice, thrice. But if you consciously go on, continue the sinful life, then you’ll have to be punished. So we should not think pervertedly, like Ravana and Kamsa.

From Srila Prabhupada’s lecture on The Nectar of Devotion — October 31, 1972, Vrndavana