Ali 'Imran 3:140

In yamsaskum qarhun faqad massaalqawma qarhun mithluhu watilka al-ayyamu nudawiluhabayna annasi waliyaAAlama Allahu allatheenaamanoo wayattakhitha minkum shuhadaa wallahula yuhibbu aththalimeen

If a wound should touch you - there has already touched the [opposing] people a wound similar to it. And these days [of varying conditions] We alternate among the people so that Allāh may make evident those who believe and [may] take to Himself from among you martyrs - and Allāh does not like the wrongdoers -

If you have received a wound, they have received a similar wound. Such days We rotate among the people, so that Allah may know those who believe and let some of you be martyrs - and Allah does not like the unjust