על צאצאי קין נ״גOn the Posterity of Cain and his Exile 53
א׳
1[180] The chief representative of this doctrine is Onan, kinsman of the leathern Er. For it says “this man knowing that the seed should not be for him, when he went in to his brother’s wife, spilled it on the ground” (Gen. 38:9), going beyond all bounds in love of self and love of pleasure.
ב׳
2[181] I should therefore address him thus: “Will you not”—so I would say to him—“by providing only your individual profit, be doing away with all the best things in the world, unless you are to get some advantage from them, honour paid to parents, loving care of a wife, bringing up of children, happy and blameless relations with domestic servants, management of a house, leadership in a city, maintaining of laws, guardianship of usages, reverence towards elders, respect for the memory of the departed, fellowship with the living, piety in words and actions towards the Deity? For you are overturning and wasting all these, by breeding and nursing for yourself pleasure, the glutton and libertine, in whom all evil things have their origin.