More violence against unbelievers:
And do not weaken in pursuit of the enemy. If you should be suffering - so are they suffering as you are suffering, but you expect from Allah that which they expect not. And Allah is ever Knowing and Wise. (Qur'an 4:104)
And do not weaken in pursuit of the enemy. Yet no enemy is specified in the Qur'an except unbelievers of various kinds. And clearly the "pursuit" is physical and martial, not spiritual or rhetorical, for Allah reminds the believers that if they're suffering the privations and difficulties of war, so are the unbelievers: "If you should be suffering - so are they suffering as you are suffering."
But the two are not equal: the believers have the comforts of Paradise to look forward to. Maulana Bulandshahri explains: “While the disbelievers (kuffar) will be subjected to the unending torment and distress in the abysses of Hell, the Muslims shall be rejoicing in the bliss and comforts of Heaven (Jannah), without the slightest worries and concerns. The disbelievers (kuffar) cannot aspire for these stages as these are promised exclusively to the Muslims. For this reason the Muslims have a much stronger incentive to fight and should do so with greater zest and zeal.”
And they do.