Adam Clarke on Daniel 11:26

Yea, they that feed of the portion of his meat - This is the proof of what has been last noted, that the intrigues of Antiochus, corrupting the ministers and officers of Ptolemy, were the cause of all the disasters that felt on the Egyptian king. They that fed of the portion of his meat - who were in his confidence and pay, and possessed the secrets of the state, betrayed him; and these were the means of destroying him and his army, so that he was defeated, as was before observed.