The Noble Qur'an

وَلاَ تَقْرَبُواْ مَالَ الْيَتِيمِ إِلاَّ بِالَّتِي هِيَ أَحْسَنُ حَتَّى يَبْلُغَ أَشُدَّهُ وَأَوْفُواْ الْكَيْلَ وَالْمِيزَانَ بِالْقِسْطِ لاَ نُكَلِّفُ نَفْساً إِلاَّ وُسْعَهَا وَإِذَا قُلْتُمْ فَاعْدِلُواْ وَلَوْ كَانَ ذَا قُرْبَى وَبِعَهْدِ اللّهِ أَوْفُواْ ذَلِكُمْ وَصَّاكُم بِهِ لَعَلَّكُمْ تَذَكَّرُونَ   

6.152 . And approach not the wealth of the orphan save with that which is better ; till he reach maturity . Give full measure and full weight , in justice . We task not any soul beyond its scope . And if ye give your word , do justice thereunto , even though it be ( against ) a kinsman ; and fulfil the covenant of Allah . This He commandeth you that haply ye may remember .