Where in the bible is it found tho your sins be as scarlet they will made white snow?

The verse you're referring to is found in Isaiah 1:18, which reads:

"Come now, and let us reason together," says the LORD: "though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool."

This verse is a beautiful promise of God's forgiveness and cleansing power. It emphasizes that even the darkest sins can be washed away by God's grace.