Jesus’ words about divorce may seem very harsh to us. How should we understand them? Is he saying that divorce is always wrong?
The book I refer to in the video is Issues Facing Christians Today: https://www.amazon.co.uk/dp/B004Q9T3G8/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1
I also found this a helpful article: https://ca.thegospelcoalition.org/columns/ad-fontes/what-the-bible-teaches-about-divorce-and-remarriage/