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

[229] So Herod went to Samaria, which was then in a tumult, and settled the city in peace; after which at the [Pentecost] festival, he returned to Jerusalem, having his armed men with him: hereupon Hyrcanus, at the request of Malichus, who feared his reproach, forbade them to introduce foreigners to mix themselves with the people of the country while they were purifying themselves; but Herod despised the pretense, and him that gave that command, and came in by night. Upon which Malithus came to him, and bewailed Antipater; Herod also made him believe [he admitted of his lamentations as real], although he had much ado to restrain his passion at him; however, he did himself bewail the murder of his father in his letters to Cassius, who, on other accounts, also hated Malichus. Cassius sent him word back that he should avenge his father's death upon him, and privately gave order to the tribunes that were under him, that they should assist Herod in a righteous action he was about.