Acts 19:17-20

This became known to all who lived in Ephesus, both Jews and Greeks. And fear fell upon them all, and the name of the Lord Jesus was magnified and exalted. Many of those who had become believers were coming, confessing and disclosing their [former sinful] practices. And many of those who had practiced magical arts collected their books and [throwing book after book on the pile] began burning them in front of everyone. They calculated their value and found it to be 50,000 pieces of silver. So the word of the Lord [concerning eternal salvation through faith in Christ] was growing greatly and prevailing.