O you who believe! fight those of the unbelievers who are near to you and let them find in you hardness; and know that Allah is with those who guard (against evil) [Quran 9:123]
The next verse says, “And whenever a chapter is revealed, there are some of them who say: Which of you has it strengthened in faith? Then as for those who believe, it strengthens them in faith and they rejoice.” That explains verse 9.123. As I have stated above, many verses of the Quran are actually answers to the facetious remarks made by the pagans.