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

[116] But now Alexander made haste with a numerous and great army, and came out of Cilicia into Syria, and burnt the country belonging to Antioch, and pillaged it; whereupon Ptolemy, and his son-in-law Demetrius, brought their army against him, (for he had already given him his daughter in marriage,) and beat Alexander, and put him to flight; and accordingly he fled into Arabia. Now it happened in the time of the battle that Ptolemy' horse, upon hearing the noise of an elephant, cast him off his back, and threw him on the ground; upon the sight of which accident, his enemies fell upon him, and gave him many wounds upon his head, and brought him into danger of death; for when his guards caught him up, he was so very ill, that for four days' time he was not able either to understand or to speak. However, Zabdiel, a prince among the Arabians, cut off Alexander's head, and sent it to Ptolemy, who recovering of his wounds, and returning to his understanding, on the fifth day, heard at once a most agreeable hearing, and saw a most agreeable sight, which were the death and the head of Alexander; yet a little after this his joy for the death of Alexander, with which he was so greatly satisfied, he also departed this life. Now Alexander, who was called Balas, reigned over Asia five years, as we have elsewhere related.