"And fight with them until there is no persecution, and religion should be only for Allah" Q.2:193

"They question you (O Mohammad) with regard to warfare in the sacred month. Say: Warfare therein is a great transgression but to turn men from the way of Allah and to disbelieve in Him and the inviolable place of worship and to expel its people thence is a greater transgression, for persecution is worse than killing"
[al-Baqarah 2:217]