Genesis 20:12
What's more, she is indeed my sister, my father's daughter, but not my mother's daughter. She became my wife.
Genesis 11:29
And Abram and Nahor took wives for themselves. The name of Abram's wife was Sarai, and the name of Nahor's wife was Milcah; she was the daughter of Haran, the father of both Milcah and Iscah.
Genesis 12:13
So tell them you are my sister so that it may go well for me because of you and my life will be spared on account of you."
1 Thessalonians 5:22
Stay away from every form of evil.
Treasury of Scripture Knowledge
Summary
                            And yet indeed she is my sister; she is the daughter of my father, but not the daughter of my mother; and she became my wife.                        
                    General references
Bible References
And yet
                                        Genesis 11:29                                        
                                                                                                                                And Abram and Nahor took wives for themselves. The name of Abram's wife was Sarai, and the name of Nahor's wife was Milcah; she was the daughter of Haran, the father of both Milcah and Iscah.
                                    
                                        Genesis 12:13                                        
                                                                                                                                So tell them you are my sister so that it may go well for me because of you and my life will be spared on account of you."
                                    
                                        1 Thessalonians 5:22                                        
                                                            
                        Stay away from every form of evil.
                                    General references
                                        Leviticus 20:17                                        
                                                            
                        "'If a man has sexual intercourse with his sister, whether the daughter of his father or his mother, so that he sees her nakedness and she sees his nakedness, it is a disgrace. They must be cut off in the sight of the children of their people. He has exposed his sister's nakedness; he will bear his punishment for iniquity.