And come not nigh to the orphan's property, except to improve it, until he attain the age of full strength; give measure and weight with (full) justice;- no burden do We place on any soul, but that which it can bear;- whenever ye speak, speak justly, even if a near relative is concerned; and fulfil the covenant of God: thus doth He command you, that ye may remember. (6:152)

Give full measure when ye measure, and weigh with a balance that is straight: that is the most fitting and the most advantageous in the final determination. (17:35)