{ Fighting is ordained for you, being something you dislike; but perhaps you dislike something that is good for you, and perhaps you like something that is bad for you; and Allah knows but you do not know } Al-baqara 216

The word of the Most High: { Fighting is ordained for you } ; the Prophet (SAW) was not given permission to fight during his time in Mecca, but when He emigrated, He was given permission to fight those of the Idolaters who fought against him. Then He was given permission to fight the Idolaters in general, and finally Allah Most High made jihad an obligation. … Regarding the benefits of jihad, these include attaining the spoils and the great joy in conquering the enemy.