We are truly saddened to hear about your sister's condition and we stand with you in prayer, crying out to the Lord for His intervention.
Let's remember the Lord Jesus Christ has the ability to heal all manor of sickness.
In Matthew 19:26 WEB Jesus says "With God all things are possible."
In Mark 10:27 WEB Jesus said, "With men it is impossible, but not with God, for all things are possible with God."
We commend you for turning to God in this time of need, but we notice that you did not mention the name of Jesus Christ. It is only by the name of Jesus that we have access to God. He will be available and save us. Acts 4:12 WEB says "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved!" We pray that your sister will unequivocally trust in Jesus as Lord and Savior. When she calls upon Jesus, she will also be calling upon the Great Physician, Jehovah Rapha, the one who is to be praised for working healing.
Join us in prayer, confidently believing that God can and will heal your sister, as He is mighty to save.
Heavenly Father, we come to You in the powerful name of Jesus here. We lift up our sister to You, Lord, asking for Your healing touch on her body. We know that You are mighty to save, by the name of Jesus here; we have no other name by which we may be saved. Encourage her in her fight.
We stand in faith, trusting that You are mighty Lord and able to heal her from this cancer. We pray for Your comfort and peace to fill her heart and the hearts of her loved ones during this time. We ask for Your wisdom and guidance.
Father, You are greater than any diagnosis or prognosis. You are the God of the impossible. We ask You for Your strength as she battles this disease.
May Your will be done in her life. We also affirm the power in simply agreeing for her healing in Christ Jesus.
By the power of the Holy Spirit, we pray
May God himself, the God of peace, sanctify you through and through. May your whole spirit, soul and body be kept blameless at the coming of our Lord Jesus Christ. The one who calls you is faithful, and he will do it. 1 Thessalonians 5:23-24
May God fill you with joy and peace so that you may overflow with hope by the power of the Holy Spirit Romans 15:13.
In Jesus name.