Did Tobias marry his sister? I know they had a lot of strange laws in the Jewish teachings. Things considered non sinful like incest - maybe that was noahide - and now it’s taught it’s wrong. God does not change but man does. What’s a sin at one time is one later. Are we given so much for awhile and later as we need it taught something else?
As others said, no.
(Greek II, 6:10-18)
And when he went into Media and already drew near to Ecbatana, Raphael said to the young man, “Brother Tobias.” And he said to him, “Here I am.” Then he said to him, “
This night we must stay in the home of Ragouelos. Now the man is your relative, and he has a (beautiful) daughter whose name is Sarra. And he has no male son or daughter except Sarra alone, and you are closer to her than all other men, to have her as an inheritance. Also the girl is sensible and brave and very beautiful, and her father is noble.” And he said, “It is right for you to take her. So listen to me, brother, and I shall speak to the father about the girl this night so that we may take her to be your bride. And, when we return from Rhaga, we shall celebrate her wedding feast. And I know that Ragouel cannot keep her from you or promise her to another; he would be liable to death according to the decree of the book of Moyses. And he knows that the inheritance is yours by right to take his daughter before any other man. So now listen to me, brother, and shall speak this night concerning the girl and have her engaged to you. And, when we return from Rhaga, we shall take her and bring her back with us to your house.”
Then in reply Tobias said to Raphael, “Brother Azarias, I have heard that she already has been given to seven husbands, and they died in their bridal chamber. On the night when they went in toward her, they would die. And I heard people say that a demon kills them. And now I am afraid – for it does not harm her, but anyone who desires to approach her it kills; I am my father’s only son – that I may die and bring my father’s and my mother’s life, because of me, to their grave with sorrow. And they have no other son, that he may bury them.”
But he said to him, “Do you not remember your father’s commandments, that he commanded you to take a wife from your father’s house? So now listen to me, brother, and do not worry about the demon, and take her. And I know that this night a wife will be given to you. Now when you go into the bridal chamber, take some of the fish’s liver and heart, and put them on the embers of the incense, and the smell will go forth. Then the demon will smell it and flee and will never be seen around her any more. And when you are about to be with her, get up first, both of you, and pray, and beseech the Lord of heaven that mercy and safety may be upon you. So do not be afraid, for she was set apart for you from of old. And you will save her, and she will go with you. And I suppose that you will have children by her, and they will be as brothers to you. Do not worry!” Now when Tobias heard the words of Raphael, and that she was his kinswoman of the lineage of his father’s house, he loved her very much, and his heart clung to her.
(Greek II, 7:1-11)
Now when they entered into Ecbatana, he said to him, “Brother Azarias, lead me straight to Ragouel our brother.” So he led him into the house of Ragouelos, and they found him sitting beside the door of the courtyard. And they greeted him first, and he said to them, “Many joyful greetings, brothers, and welcome in good health!” Then he led them into his house. And he said to Edna his wife, “How much this young man resembles Tobis my kinsman!” Then Edna asked them and said to them, “Where are you from, brothers?” And they said to her, “We belong to the children of Nephthaleim, who were taken captive in Nineue.” So she said to them, “Do you know Tobis our kinsman?” And they said to her, “We do know him.” Then she said to them, “Is he in good health?” And they said to her, “He is in good health and alive.” And Tobias said, “He is my father!” Then Ragouel jumped up and kissed him and wept. And he spoke and said to him, “Blessings on you, my child, son of a noble and good father! O most miserable of calamities that a righteous man who also gives alms has becomes blind!” Then he fell on the neck of Tobias his kinsman and wept. Also Edna his wife wept for him, and Sarra their daughter likewise wept. Then he slaughtered a ram from the flock and welcomed them very warmly.
Now when they had bathed and washed themselves and had reclined to have dinner, Tobias said to Raphael, “
Brother Azarias, speak to Ragouel that he give to me Sarra my kinswoman.” But Ragouel heard the word and said to the lad, “Eat, and drink, and be merry this night. For there is no man who has the right to take Sarra my daughter except you, brother. Likewise I myself do not have the authority to give her to any other man except you, because you are my nearest relative. But let me explain the truth more fully, my child. I have given her to seven men of our kinsmen, and all died on the night when they went in toward her. So now, my child, eat, and drink, and the Lord will do something with you both.” Then Tobias said, “I will neither eat nor drink until you settle the things that pertain to me.” So Ragouel said to him, “
I will do it. Indeed, she is given to you according to the decree of the book of Moyses, and from heaven it has been decreed that she be given to you. Take your kinswoman; from now on you are her brother, and she is your sister. She has been given to you from today and forever. And may the Lord of heaven prosper you both this night, my child, and grant you mercy and peace.”