Numbers 5 &6: Why so much given to the innocence or guilt of the woman and not the man? Is this not one-sided? But to help us see the bigger picture we must recall the warning in Prov 6:34. Men are more prone to retaliation than women. Second, her womb must be preserved; unlike today. Thirdly, God has put into place that which will protect her from the accusations from her husband. Lastly, is the warning from Eccl 5: if you make a vow, be sure to keep it otherwise you are seen as a fool. [Eccl 5:4]
Fast forward to the NT and we see how Jesus used this law to protect the Samaritan woman [John 4] who had been used by unscrupulous men, even up to 5 of them! Then the woman caught in adultery [John 8:10] and the Pharisees in their self-righteousness are exposed because they too were “jealous” and their sin exposed as Jesus wrote on the sand. Did he write this passage? We don’t know but one by one they left beginning with the eldest to the youngest. Jesus asked her where are your accusers and she said there is no one. In his most gracious and loving way he said, neither do I condemn you, but go and sin no more. He acknowledged her sin but forgave her.
So what is our takeaway? Purity is held to a high standard in God’s eyes. Be ye pure so God can bless you. We are cleansed by Jesus. It is interesting that Numbers 6 includes the Aaronic Blessing which is in summary form was what Jesus offered to the woman caught in adultery.