Observe also the superficiality and manifest falsity of such a statement of Celsus, when he asserts “that he who was partaker of a man's table would not conspire against him; and if he would not conspire against a man, much less would he plot against a God after banqueting with him.” For who does not know that many persons, after partaking of the salt on the table, have entered into a conspiracy against their entertainers? The whole of Greek and Barbarian history is full of such instances. And the Iambic poet of Paros, when upbraiding Lycambes with having violated covenants confirmed by the salt of the table, says to him:—
“But you have broken a mighty oath— that, viz., by the salt of the table.”
And they who are interested in historical learning, and who give themselves wholly to it, to the neglect of other branches of knowledge more necessary for the conduct of life, can quote numerous instances, showing that they who shared in the hospitality of others entered into conspiracies against them.
Source: Against Celsus (New Advent)