وَاِذْ قَتَلْتُمْ نَفْسًا فَادّٰرَءْتُمْ فِيْهَا ۗ وَاللّٰهُ مُخْرِجٌ مَّا كُنْتُمْ تَكْتُمُوْنَ ۚ ( البقرة: ٧٢ )
Wa iz qataltum nafsan faddaara'tum feehaa wallaahu mukrijum maa kuntum taktumoon (al-Baq̈arah 2:72)
And [recall] when you slew a man and disputed over it, but Allah was to bring out that which you were concealing. (Al-Baqarah  : 72)
1 Mufti Taqi Usmani
And when you killed a man, and started putting the blame for it on one another, while Allah was to bring forth what you were holding back.