Mwanzo 19:33

Usiku ule walimnywesha baba yao mvinyo, alipolewa binti yake mkubwa akaingia na kukutana naye kimwili. Baba yao hakujua wakati binti yake alipoingia kulala naye wala alipotoka.

And they made their father drink wine that night: and the firstborn went in, and lay with her father; and he perceived not when she lay down, nor when she arose.