﴿ أَوَلَمَّآ أَصَٰبَتْكُم مُّصِيبَةٌۭ قَدْ أَصَبْتُم مِّثْلَيْهَا قُلْتُمْ أَنَّىٰ هَٰذَا ۖ قُلْ هُوَ مِنْ عِندِ أَنفُسِكُمْ ۗ إِنَّ ٱللَّهَ عَلَىٰ كُلِّ شَىْءٍۢ قَدِيرٌۭ ﴾

“AND DO YOU, now that a calamity has befallen you after you had inflicted twice as much [on your foes], ask yourselves, "How has this come about?" Say: "It has come from your own selves." Verily, God has the power to will anything:”

Please check ayah 3:168 for complete tafsir.