An-Nisa 4:6 وابتلوا اليتامى حتى اذا بلغوا النكاح فان انستم منهم رشدا فادفعوا اليهم اموالهم ولا تاكلوها اسرافا وبدارا ان يكبروا ومن كان غنيا فليستعفف ومن كان فقيرا فلياكل بالمعروف فاذا دفعتم اليهم اموالهم فاشهدوا عليهم وكفى بالله حسيبا ٦

Make trial of orphans until they reach the age of marriage; if then ye find sound judgment in them, release their property to them; but consume it not wastefully, nor in haste against their growing up. If the guardian is well-off, Let him claim no remuneration, but if he is poor, let him have for himself what is just and reasonable. When ye release their property to them, take witnesses in their presence: But all-sufficient is Allah in taking account.