Al-Baqarah 2:217 يسالونك عن الشهر الحرام قتال فيه قل قتال فيه كبير وصد عن سبيل الله وكفر به والمسجد الحرام واخراج اهله منه اكبر عند الله والفتنة اكبر من القتل ولا يزالون يقاتلونكم حتى يردوكم عن دينكم ان استطاعوا ومن يرتدد منكم عن دينه فيمت وهو كافر فاولايك حبطت اعمالهم في الدنيا والاخرة واولايك اصحاب النار هم فيها خالدون ٢١٧

They ask you concerning fighting in the Sacred Months (i.e. 1st, 7th, 11th and 12th months of the Islâmic calendar). Say "Fighting therein is a great (transgression) but a greater (transgression)¹ with Allâh is to prevent mankind from following the Way of Allâh, to disbelieve in Him, to prevent access to Al-Masjid-Al-Harâm (at Makkah), and to drive out its inhabitants, and Al-Fitnah² is worse than killing. And they will never cease fighting you until they turn you back from your religion (Islâmic Monotheism) if they can. And whosoever of you turns back from his religion and dies as a disbeliever, then his deeds will be lost in this life and in the Hereafter, and they will be the dwellers of the Fire. They will abide therein forever."