Tractate Sanhedrin, Herbert Danby tr. , at sacred-texts.com
M. VII. 11. A sorcerer 5 is the one who accomplishes some deed, not merely deceives the eyes. R.
M.[paragraph continues] Akiba, in the name of R. Jehoshua, said: It is as though two people were picking cucumbers; one was innocent and the other guilty. He who actually did pick was guilty, but he who only appeared to do so was innocent.
106:5 Deut. 18. 10; Exod. 22. 18.
107:1 Exod. 22. 18.