Philo Judaeus De Virtutibus 79

[79] for Moses alone, looking upon it as it should seem that his whole nation had from the very beginning the closest of all possible relationships to God, one much more genuine than that which consists of ties of blood, made it the inheritor of all the good things which the nature of mankind is capable of receiving, giving from his own store things which he had himself, and entreating God to supply what he himself was not possessed of, knowing that the fountains of his graces are everlasting, but yet that they are not dispensed to all men, but only to such as are suppliants for them; and suppliants are those persons who love virtue and piety, and it is lawful for them to drink up those most sacred springs, inasmuch as they are continually thirsting for wisdom.