Philo Judaeus De Cherubim 33

[33] But the reproaches which Balaam utters are in some degree expressed by all those who are not purified, but are always talking foolishly, devoting themselves to the life of a merchant, or of a farmer, or to some other business, the object of which is to provide the things necessary for life. As long, indeed, as everything goes on prosperously with respect to each individual, he mounts his animal joyfully and rides on cheerfully, and holding the reins firmly he will by no means consent to let them go. And if any one advises him to dismount and to set bounds to his appetites, because of his inability to know what will befall him hereafter, he reproaches him with jealousy and envy, saying that he does not address him in this way out of good will.