وَآتُوا الْيَتَامَىٰ أَمْوَالَهُمْ ۖ وَلَا تَتَبَدَّلُوا الْخَبِيثَ بِالطَّيِّبِ ۖ وَلَا تَأْكُلُوا أَمْوَالَهُمْ إِلَىٰ أَمْوَالِكُمْ ۚ إِنَّهُ كَانَ حُوبًا كَبِيرًا (2)
(4:2) Give orphans their property, *2 and do not exchange the bad for the good, *3 and do not eat up their property by mixing it with your own. This surely is a mighty sin.
*2). God directs the guardians of the orphans to spend out of the latter's property while they are still minors, and to restore it to them when they attain majority.
*3). The order not to exchange the bad for the good has several meanings. On the one hand, it means that one should not replace honest by dishonest living. At the same time, it also means that one should not exchange one's own property which is of little value for the more valuable property of the orphans.