>In all transactions of barter or buying and selling, a man must be strictly honest. He must neither cheat with the weights nor with the grain measures. The Ape-god sits on the scales and his heart is the pointer; if thou givest light or short weight he will know at once, and thy punishment is certain.

>For as Thoth removes the scribe who renders false accounts, even so will God remove the man who makes the pointer of the scales to register falsely by the use of false weights. Every cunning device of the cheater will become known to the Ape-god, therefore do not obliterate the characters on the weights, and on the measures for grain, which indicate weight and capacity.

--The Teaching Of Amen-Em-Apt, Son Of Kanekht, by Sir E.A. Wallis Budge