Praying for y'all.
Wanted to add this: I'm sorry this has happened. I really do hope that the wedding is halted and that everyone is okay. For whatever reasons, you see danger for your daughter and she's rushing toward it at breakneck speed against your advice and against your will. You're convinced that God is against the marriage.
I'm not a therapist or a mind-reader and I don't know you, but I do hear you. And, I know that as a dad, if my daughter were marrying someone I truly, prayerfully considered as not the husband God has for her, I'd be broken, too.
As a parent, then, I'm praying this:
Lord, you said there would be divisions and conflicts over you within families. You also promise that if we trust you and do not lean to our own understanding that you will direct our paths. You also say that our paths are to pursue peace with everyone. You arm us with peace and salvation and your Word and more. I pray for your peace for this family. For your healing to come swiftly to them.
I ask you to do as you have spoken, Lord (2 Sam. 7:25). You said that you would pour out water on thirsty land and streams on dry ground and that you would pour out your Spirit on our sons and daughters. (Isa. 44:3, 4). In due time, in Your time, in Your way, Lord, do this for mama27's daughter.
Do as you have spoken. You said, "I will contend with the ones who contend with you." Is. 49:25. Lord, there is a contention in this family now, and a contention in the heart of this daughter to do as she wills. Contend with the heart of this daughter, and bring her to peace in You, and bring her to stop this wedding for now, if it be your will, Lord. If you are doing more than she can understand and see, then let mama27 by grace through faith have peace! Contend with her!! Bring even her to peace in You in this. Intervene for mama27. Comfort her with the understanding that is greater than knowledge that you are sovereign in this matter. Call her to your peace.
Do as you have spoken, Lord. You said, "Awake, o sleeper, arise from the dead and Christ will shine on you ... be filled with the Spirit." Eph. 5:14, 18. Wake up from slumber this daughter and shine on her and fill her with your Spirit. And it isn't as if You cannot do this if she's married to her betrothed -- we know you can and do. We ask that you do.
Do as you've spoken, Lord. Pour out your Spirit on mama27's daughter, cause her even against her own intuition and thoughts to prophesy (Acts 2:15-17) so that she gains understanding of her decision. And, if not, Lord, then pour yourself upon her and cause her to speak your Word anyway. Save her, fill her with your Spirit. And, whether she marries or not, save the young man, too!
Do as you have spoken, Lord. You are not slow to fulfill your promises as some count slowness, but you are patient toward us, not willing that any should perish but that all should come to repentance. 2 Peter 3:9. Multiply over and again that patience in mama27, in her daughter even. Cause this young woman to come to life in you; bring the would-be groom to you. Cause mama27 to be a wellspring of sweetness to them that --- like my own mother-in-law was to this hellion when I was a lost young man -- wins them over and wins him over to you. Use mama27 to win not only her daughter's heart to you, but this man who would marry her daughter if they do marry. Show mama27 that if her daughter marries him, a new mama27 may need to be transformed more into the image of Jesus in order to reach her new son-in-law for you. The reluctant missionary she may be for now, but overwhelm mama with love for him if they marry. Save them, Lord.