It is narrated from Amr bin Dinar (may Allah have mercy on him) that he heard from Bijalah, who said: Umar (may Allah be pleased with him) wrote (to his governors): "Kill every male and female magician." Bijalah said: Then we killed three magicians.
Hadith Referenceمسند الإمام الشافعي / كتاب القتل والقصاص والديات والقسامة / 1612
Hadith Takhrijاخرجه ابوداود، الخراج والفى والامارة، باب فى اخذ الجزية من المجوس (3043) - واحمد: 1 / 190، 191 - وصححه ابن الجارود (1105)۔