Acts 19:18-20

19:18 Many of those who had believed came forward, confessing and making their deeds known. 19:19 Large numbers of those who had practiced magic collected their books and burned them up in the presence of everyone. When the value of the books was added up, it was found to total fifty thousand silver coins. 19:20 In this way the word of the Lord continued to grow in power and to prevail.