Quran 4, An-Nisa (the Women) ⓘ

4:2Give unto orphans their wealth. Exchange not the good for the bad (in your management thereof) nor absorb their wealth into your own wealth. Lo! that would be a great sin.

وَآتُوا الْيَتَامَى أَمْوَالَهُمْ وَلَا تَتَبَدَّلُوا الْخَبِيثَ بِالطَّيِّبِ وَلَا تَأْكُلُوا أَمْوَالَهُمْ إِلَى أَمْوَالِكُمْ إِنَّهُ كَانَ حُوبًا كَبِيرًا