Tobit 6:18

¹⁸the demon will smell it and flee and will never be seen near her any more. Now when you are about to go to bed with her, both of you must first stand up and pray, imploring the Lord of heaven that mercy and safety may be granted to you. Do not be afraid, for she has always been set apart for you. You will save her, and she will go with you. I know that you will have children by her, and they will be as brothers and sisters to you. Now say no more!” When Tobias heard the words of Raphael and learned that she was his sister, related through his father’s lineage, he loved her very much, and his heart was drawn to her.^*