Genesis

And Samuel spake unto all the house of Israel, saying, If ye do return unto the Lord with all your hearts, then put away the strange gods and Ashtaroth from among you, and prepare your hearts unto the Lord, and serve him only: and he will deliver you out of the hand of the Philistines.

Now therefore fear the Lord, and serve him in sincerity and in truth: and put away the gods which your fathers served on the other side of the flood, and in Egypt; and serve ye the Lord.

And Moses went down from the mount unto the people, and sanctified the people; and they washed their clothes.

And the Lord said unto Moses, Go unto the people, and sanctify them to day and to morrow, and let them wash their clothes,

I love the Lord, because he hath heard my voice and my supplications.