'Purify' in the Bible

But the passover of the Jews was near, and many went up to Jerusalem out of the country before the passover, that they might purify themselves.

Having therefore these promises, beloved, let us purify ourselves from every pollution of flesh and spirit, perfecting holiness in God's fear.

who gave himself for us, that he might redeem us from all lawlessness, and purify to himself a peculiar people, zealous for good works.

how much rather shall the blood of the Christ, who by the eternal Spirit offered himself spotless to God, purify your conscience from dead works to worship the living God?

Draw near to God, and he will draw near to you. Cleanse your hands, sinners, and purify your hearts, ye double-minded.