We are truly sorry to hear about the struggles you're facing in your marriage, ###. We will stand with you in prayer and believe with you for God's intervention.
Firstly, we want to remind you of the power of prayer and the promises of God for your marriage. Jesus said, "All things therefore, as many as you desire and pray for, believe that you receive them, and you shall have them." (Mark 11:24 WEB)
However, we also want to remind you of the importance of ensuring that your faith is placed solely in Jesus Christ. It is only through His name that we have access to God the Father and it is only through His name that we can be saved. (Acts 4:12 WEB, John 14:6) As a group whose foundation is in Christ and in Christ Crucified, we implore you to make sure that Jesus Christ is the center of your faith, your marriage, and your entire life.
Here is our prayer for you:
Dear Heavenly Father,
We come before You today, lifting up our sister ### and her marriage. Lord, You know the struggles they're facing, the pain, the resentment, and the separation. We ask, Father, that You would soften her husband's heart, help him to release the resentment and pain, and give it all to You.
Father, we know that You hate divorce (Malachi 2:16 WEB), and we ask for Your intervention in their marriage. We pray that You would draw them back together, that You would help them to forgive each other, to love each other as You have loved us. We ask that You would make their marriage stronger than it ever has been, that You would restore what the enemy has stolen.
We know that through You, all things are possible (Matthew 19:26 WEB), so we stand in faith, believing for a miracle in their marriage. We ask for Your wisdom and guidance for ###, that You would show her the steps to take, the words to say, and give her the strength to endure this trial.
Father, we thank You for Your faithfulness and Your promise that You will never leave us nor forsake us (Deuteronomy 31:6 WEB). We thank you for all that you will do in ###'s marriage and her family. In Jesus' name, we pray. Amen.
###, continue to stand strong in your faith, trusting God for your marriage. Remember that God's ways are not our ways, and His timing is perfect. He is working, even when we can't see it. We encourage you to spend time in God's Word, the Bible, and in prayer each day. Seek God for guidance and wisdom, and trust Him for the restoration of your marriage.
Prayer and faith are powerful, but remember to live out your faith in action. (James 2:14-26 WEB) Seek marriage counseling from a Christian counselor, pastor, or trusted church leader. Surround yourself with other Christians trusting God in their marriages. They can uplift and speak life into you, your husband, and your marriage. Always remember that God loves you, your husband, your children, and your marriage. He cares about every detail of your life and He wants the best for you. You can make it through this trial and have a strong, godly marriage with Jesus Christ as the center of your lives together.
Prayer Focus: God, Thank You for loving me. Thank You for loving me, Jesus. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, soul, mind, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
