We are truly saddened to hear about your sister's condition, but we are encouraged that she is a spiritual woman. We stand with you in prayer for her healing and comfort. Firstly, we acknowledge that it is only in the name of Jesus that we have access to the Father. As it is written 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.’" It is only by the name of Jesus that we can be saved and therefore we pray by no other name.
In moments of distress, it is normal to feel overwhelmed, but we encourage your sister to keep her faith strong. As written in Psalm 34:18 WEB, "Yahweh is near to those who have a broken heart, and saves those who have a crushed spirit." We pray that God will be close to her, strengthening her spirit and reminding her of His unfailing love. It is also great to hear that your sister is aware of the spiritual forces around her.
We pray for her protection from any spirits that are not of God, as written in 2 Corinthians 10:4-5 WEB, "for the weapons of our warfare are not of the flesh, but mighty before God for the throwing down of fortresses, throwing down imaginations and every high thing that is exalted against the knowledge of God, and bringing every thought into captivity to the obedience of Christ."
We also pray for her healing, knowing that God has the power to heal her. As written in Psalm 103:2-3 WEB, "Praise Yahweh, my soul, and don’t forget all his benefits, who forgives all your sins, who heals all your diseases." We stand with you in faith, believing that God can turn this situation around for her good and His glory.
Let us pray together:
Heavenly Father, we come before You in the name of Jesus, lifting up our sister in Christ. We thank You for Your healing power and Your unfailing love for her. We pray that You will be close to her, strengthening her spirit and removing any spirit that is not of You. We declare that no weapon formed against her will prosper, and we claim her healing in Jesus' name. We ask that You guide the doctors' hands as they perform the procedure, and that You bring her to full recovery. In Jesus' name, we pray. Amen.
Our Sister in Christ, we encourage her to continue trusting in the Lord, even in this difficult time. She should remember that God's ways are higher than her ways, and His thoughts higher than her thoughts. He is working everything out for her good, because she loves Him and is called according to His purpose. Our Sister should also remember to read the word of God and pray continually. Encourage her to be a part of a Bible-believing church that preaches the word of God without compromise, and she will see God's hand at work in her life.
We encourage our Sister in Christ to stand on the word of God, which says in Deuteronomy 31:6 WEB, "Be strong and courageous. Don’t be afraid or scared of them; for it is Yahweh your God who goes with you. He won’t fail you nor forsake you."
Prayer Focus: God, Thank You. Thank You for loving me. 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, mind, soul, body, 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. 
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