وَآتُوا اليَتامىٰ أَموالَهُم ۖ وَلا تَتَبَدَّلُوا الخَبيثَ بِالطَّيِّبِ ۖ وَلا تَأكُلوا أَموالَهُم إِلىٰ أَموالِكُم ۚ إِنَّهُ كانَ حوبًا كَبيرًا

To orphans, return their properties rightfully. Don’t substitute bad with good, nor absorb their wealth into your own. Indeed, it is a great sin.