Genesis 4:8

4:8 Cain said to his brother Abel, “Let’s go out to the field.” While they were in the field, Cain attacked his brother Abel and killed him.

Genesis 30:3

30:3 She replied, “Here is my servant Bilhah! Have sexual relations with her so that she can bear children for me and I can have a family through her.”

Genesis 30:26

30:26 Let me take my wives and my children whom I have acquired by working for you. Then I’ll depart, because you know how hard I’ve worked for you.”

Genesis 38:8

38:8 Then Judah said to Onan, “Have sexual relations with your brother’s wife and fulfill the duty of a brother-in-law to her so that you may raise up a descendant for your brother.”