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

[208] But when those that were in the citadel had sent to Trypho, and besought him to make haste and come to them, and to send them provisions, he prepared his cavalry as though he would be at Jerusalem that very night; but so great a quantity of snow fell in the night, that it covered the roads, and made them so deep, that there was no passing, especially for the cavalry. This hindered him from coming to Jerusalem; whereupon Trypho removed thence, and came into Celesyria, and falling vehemently upon the land of Gilead, he slew Jonathan there; and when he had given order for his burial, he returned himself to Antioch. However, Simon sent some to the city Basca to bring away his brother's bones, and buried them in their own city Modin; and all the people made great lamentation over him. Simon also erected a very large monument for his father and his brethren, of white and polished stone, and raised it a great height, and so as to be seen a long way off, and made cloisters about it, and set up pillars, which were of one stone apiece; a work it was wonderful to see. Moreover, he built seven pyramids also for his parents and his brethren, one for each of them, which were made very surprising, both for their largeness and beauty, and which have been preserved to this day; and we know that it was Simon who bestowed so much zeal about the burial of Jonathan, and the building of these monuments for his relations. Now Jonathan died when he had been high priest four years ¹ and had been also the governor of his nation. And these were the circumstances that concerned his death.