Daniel 11:17

‘And he will set his face to come with the strength of his whole kingdom, and upright ones with him, and he will do his pleasure, and he will give him the daughter of women to corrupt her, but she will not stand, nor be for him.'

Antiochus came against Egypt with all his strength, including ‘upright ones'. This may represent Israelites who in the Psalms are often thought of as ‘the upright'. Alternately the word may mean ‘equitable conditions' and refer to an agreement. Either way he did make an alliance and offered his daughter Cleopatra in marriage to the boy Pharaoh. His hope was to ‘corrupt her', that is make her act in a way not fitting for a wife by desiring her to betray her husband. But Cleopatra in fact refused to cooperate and was thenceforth faithful to her husband. She no doubt felt that her future lay in Egypt and that it was in her interests.