'Pure' in the Bible

Pure and undefiled religion before God the Father is this: to care for orphans and widows in their misfortune and to keep oneself unstained by the world.

But the wisdom from above is first pure, then peaceable, gentle, accommodating, full of mercy and good fruit, impartial, and not hypocritical.

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