سورة Al-An'am ( The Cattle ) - الآية 152

And that you approach not the property of the orphan, save in the fairer manner, until he is of age. And fill up the measure and the balance with justice. We charge not any soul save to its capacity. And when you speak, be just, even if it should be to a near kinsman. And fulfil God's covenant. That then He has charged you with; haply you will remember.