Ezra 4:13-14

13 Be it known now unto the king, that, if this city be builded, and the walls set up again, then will they not pay toll, tribute, and custom, and so thou shalt endamage the revenue of the kings.
14 Now because we have maintenance from the king's palace, and it was not meet for us to see the king's dishonour, therefore have we sent and certified the king;