And they will give their father wine to drink in that night, and the first-born will go in and will lie down with her father; and he will not know in her lying down, and in her rising up.
And it shall be on the morrow, and the first-born will say to the small, Behold, I lay down yesterday with my father: we will also give him wine to drink this night; and go thou, lie down with him, and we shall preserve alive seed from our father.