Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[43] When Alexander knew what promises Demetrius had made Jonathan, and withal knew his courage, and what great things he had done when he fought the Macedonians, and besides what hardships he had undergone by the means of Demetrius, and of Bacchides, the general of Demetrius's army, he told his friends that he could not at present find any one else that might afford him better assistance than Jonathan, who was both courageous against his enemies, and had a particular hatred against Demetrius, as having both suffered many hard things from him, and acted many hard things against him. If therefore they were of opinion that they should make him their friend against Demetrius, it was more for their advantage to invite him to assist them now than at another time. It being therefore determined by him and his friends to send to Jonathan, he wrote to him this epistle: "King Alexander to his brother Jonathan, sendeth greeting. We have long ago heard of thy courage and thy fidelity, and for that reason have sent to thee, to make with thee a league of friendship and mutual assistance. We therefore do ordain thee this day the high priest of the Jews, and that thou beest called my friend. I have also sent thee, as presents, a purple robe and a golden crown, and desire that, now thou art by us honored, thou wilt in like manner respect us also."