Give it a lot of water. Your cat is safe. That kind of stuff doesnt do any harm. Give it a lot of water so it can dissolve away and it wont start feeling bad.
What Do You Do If Your Cat Got Into Liquid Laundry Soap And Licked Off Of Themselves?
They most likely will get an upset stomach and vomit it back up. There should be an 800 number on the bottle of soap that you can call for poison information.