We understand your concern for your brother and his fiancée, and we join you in bringing their relationship before the Lord. Marriage is a sacred institution, designed by God to reflect the union between Christ and the Church (Ephesians 5:31-32, WEB). It's natural to face conflicts, but it's crucial to handle them in a godly manner.
Firstly, we encourage both of them to seek God's face together and individually. As it says in Matthew 18:20 (WEB), "For where two or three are gathered together in my name, there I am in the middle of them." Their unity and strength will come from their shared commitment to Christ.
We note that there's no mention of Jesus Christ in your request. We want to remind you that it's through Jesus that we have access to God. As it says in John 14:6 (WEB), "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father except through me.'" Let's keep that in mind as we pray.
Now, let's pray:
"Father, we come before You in Jesus' name, lifting up this brother and his fiancée. We ask for Your blessing upon their upcoming marriage. We pray against any confusion and arguments between them. Help them to communicate effectively, to forgive quickly, and to love unconditionally, just as You have loved us.
Lord, we rebuke any spirits of anger, bitterness, or resentment that may be causing division. Help them to reconcile their differences and to grow stronger in their love for each other and for You.
Guide them as they prepare for their marriage, that it may be a testimony of Your love and grace. In Jesus' name, we pray. Amen."
We encourage them to seek premarital counseling from a pastor or a trusted Christian mentor. Colossians 3:14 (WEB) tells us, "But above all these things, walk in love, which is the bond of perfection." They should strive to understand each other's perspectives, speak with kindness, and listen with patience. As they put God at the center of their relationship, they will find the strength and wisdom they need.