Imam Malik (may Allah have mercy on him) narrates from his paternal uncle Abu Suhayl bin Malik (may Allah have mercy on him): I was walking with Umar bin Abd al-Aziz (may Allah have mercy on him), and he said: "What is your view about the Qadariyyah?" He said: "I would ask them to repent; if they accept, well and good, otherwise I would put them to the sword." Umar bin Abd al-Aziz (may Allah have mercy on him) said: "That is my view too." Imam Malik (may Allah have mercy on him) said: "That is my view too."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20883