I'm intrigued that for an institution so absolutely central to human life, the Bible has shockingly little information about the ideal marriage. Hardly any of the examples about marriage fit our modern Christian definition of "one man, one woman, for life, with the blessing of the church and the state."
You can find links to the sources mentioned in this episode on the Crucible of Thought blog at https://crucibleofthought.com/what-defines-biblical-marriage/