Genesis 19:34-36

Darby Translation

³⁴ And it came to pass on the next day that the first-born said to the younger, Lo, I lay last night with my father: let us give him wine to drink to-night also, and go thou in, lie with him, that we may preserve seed alive of our father.

³⁵ And they gave their father wine to drink that night also. And the younger arose, and lay with him; and he did not know of her lying down, nor of her rising.

³⁶ And both the daughters of Lot were with child by their father.