3:166
وَمَآ أَصَٰبَكُمْ يَوْمَ ٱلْتَقَى ٱلْجَمْعَانِ فَبِإِذْنِ ٱللَّهِ وَلِيَعْلَمَ ٱلْمُؤْمِنِينَ
Wa maa asaabakum yawmal taqal jam'aani fabiiznil laahi wa liya'lamal mu'mineen
What ye suffered on the day the two armies Met, was with the leave of Allah, in order that He might test the believers,-