What is the constitutional amendment that out lawed slavery

It is Amendment 13

Explanation:

here's a definition

The Thirteenth Amendment (Amendment XIII) to the United States Constitution abolished slavery and involuntary servitude, except as punishment for a crime. In Congress, it was passed by the Senate on April 8, 1864, and by the House on January 31, 1865.

what is the question you are trying to ask?

answer; you can turn right on a red signal (when posted);