Action in Ecbatana and Rhages

We are reading in Tobit, chapter 7 this week, covering the marriage of Sarah to Tobias. A few questions:

1. Why does Raguel emphasize kinship so carefully?
2. What does the Book of Moses say about marriage?
3. Where in the scriptures, Old Testament or New Testament, is a marriage associated with spiritual warfare? This question concerns us also in the next chapter or so.

Let us prepare for action from the Holy Spirit, who will help us benefit from this part of the scriptures.