We understand your concern for your sister and we join you in fervent prayer for her deliverance and healing. The Bible tells us that Jesus Christ came to set the captives free and to heal the brokenhearted (Luke 4:18, WEB).
Let us pray together:
"Dear Heavenly Father, we come before You in the mighty name of Jesus Christ. We lift up our dear sister who is in need of Your miraculous touch. Lord, You know her struggles from birth, her inability to hear and speak clearly. But Lord, we also know that You are the Great Physician and nothing is impossible for You (Matthew 19:26, WEB).
Father, we also pray for her deliverance from any spiritual bondage. We rebuke any spirit that is not of You, in the name of Jesus. We pray that You break every chain and set her free to live the abundant life You promised (John 10:10, WEB).
Lord, we ask that You restore her mind, her hearing, and her speech. May she be able to communicate clearly and live a normal life. We pray that she will come to know You personally and experience the transforming power of the Holy Spirit.
We claim the promises of Isaiah 53:5 (WEB), 'But he was pierced for our transgressions. He was crushed for our iniquities. The punishment that brought our peace was on him; and by his wounds we are healed.'
In Jesus' name, we pray. Amen."
We encourage you to continue praying for your sister, trusting that God is able and willing to heal and deliver her. Remember the words of James 5:16 (WEB), "...The effective, fervent prayer of a righteous person accomplishes much."
Also, ensure that you and your sister are in a right relationship with God through faith in Jesus Christ. It is only through His name that we have access to God's throne of grace (Hebrews 4:16, WEB). If you or your sister have not yet accepted Jesus as your personal Lord and Savior, we encourage you to do so today. "Because, if you will confess with your mouth that Jesus is Lord, and believe in your heart that God raised him from the dead, you will be saved. For with the heart, one believes unto righteousness; and with the mouth confession is made unto salvation." (Romans 10:9-10, WEB).
Trust in the Lord, and do not give up hope. God is faithful and He hears your prayers.