Matendo ya Mitume 19 : 19 Acts chapter 19 verse 19

Na watu wengi katika wale waliotumia mambo ya uganga wakakusanya vitabu vyao, wakavichoma moto mbele ya watu wote; wakafanya hesabu ya thamani yake, wakaona ya kwamba yapata fedha hamsini elfu.
soma Mlango wa 19

Many of those who practiced magical arts brought their books together and burned them in the sight of all. They counted the price of them, and found it to be fifty thousand pieces of silver.{The 50,000 pieces of silver here probably referred to 50,000 drachmas. If so, the value of the burned books was equivalent to about 160 man-years of wages for agricultural laborers}