Ezra 4:14 - Joseph Benson’s Commentary on the Old and New Testaments

Now because we have maintenance from the king's palace In the Hebrew it is, we are salted with the salt of the palace. That is, are sustained by the king's munificence, or have a salary from him, as Junius translates it. In ancient times, it appears, it was usual to allow those who had deserved well, and on that account were honourably provided for at the king's charge, among other things, a daily quantity of salt; it being a thing very necessary in human life. Locke, however, who translates the clause, we have eaten of the king's salt, understands the meaning to be, “We have engaged ourselves in a covenant of friendship with him.” It was not meet for us to see the king's dishonour Thus they represent themselves as very loyal to the government, and mightily concerned for the honour and interest of it; and hence they urge the king to put a stop to the building of the city and temple of Jerusalem, as what would certainly be to his loss and dishonour.