Philo Judaeus De Abrahamo 54

[54] Very appropriately, therefore, has he represented, as united by relationship, these three, which in name indeed are men, but in reality, as I have said before, virtues, nature, instruction, and practise, which men also call by another name, and entitle them the three graces ( χάριτες), either from the fact of God having bestowed ( κεχαρίσθαι) on our race those three powers, in order to produce the perfection of life, or because they themselves have bestowed themselves on the rational soul as the most glorious of gifts, so that the eternal name, as set forth in the scriptures, may not be used in conjunction with three men, but rather with the aforesaid powers;