Xenophon Hellenica 6.4.37

[37] Now her hatred toward her husband is said by some people to have been caused by the fact that when Alexander had imprisoned his own favourite, who was a beautiful youth, and she begged him to release him, he took him out and slew him; others, however, say that inasmuch as no children were being born to him of this woman, Alexander was sending to Thebes and trying to win as his wife the widow of Jason. The reasons, then, for the plot on the part of his wife are thus stated; but as for those who executed this deed, Tisiphonus, who was the eldest of the brothers, held the position of ruler up to the time when this ¹ narrative was written. ²