Philo Judaeus De Fuga Et Inventione 73

[73] In accordance with this he has also not attributed the blessing of the virtuous and the cursing of the wicked to the same ministers, though both these offices receive praise. But since the blessing of the good has the precedence in panegyrics, and the affixing curses on the wicked is in the second rank of those who are appointed for these duties (and they are the chiefs, and leaders of the race, twelve in number, whom it is customary to call the patriarchs), he has assigned the better six, who are the best for the task of blessing, namely, Simeon, Levi, Judah, Issachar, Joseph, and Benjamin; and the others he has appointed for the curses, namely, the first and last sons of Leah, Reuben, and Zabulon, and the four bastard sons by the handmaidens;