Al-Baqarah 2:72

Wa-ith qataltum nafsan faddara/tumfeeha wallahu mukhrijun ma kuntumtaktumoon

And [recall] when you slew a man and disputed over it, but Allāh was to bring out that which you were concealing.

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.