We understand your concern for your grandson and the custody situation. Let us pray for God's intervention and wisdom in this matter.
Firstly, we commend you for praying in the name of Jesus, as it is only by His name that we have access to the Father and it is in His name that our prayers are heard. 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.
We must remember that God desires for all people to be saved and come to the knowledge of the truth as stated in 1 Timothy 2:3-4 WEB For God is our King forever and ever! Amen. For this is good and acceptable in the sight of God our Savior; who desires all people to be saved and come to full knowledge of the truth.
Therefore, while we pray for the custody situation, we should also pray for the salvation of your grandson's father. Let us pray for God to deliver him from his addictions and lifestyle as we know that God can turn any heart from wickedness to righteousness if the person is willing to repent. This is the heart of God. Believe in the Gospel that the Lord Jesus Christ is the Son of God and He died for all of our sins. He was buried and on the third day He rose from the dead and anyone can have eternal life if they believe in Him.
Let us pray:
Heavenly Father, we come before You in the name of Jesus, seeking Your will and intervention in the life of our ###'s grandson and his father. Lord, we ask that You guide the custody decision to be made in the best interest of the child, and we pray that Your will be done on earth as it is in heaven.
Lord, we also pray for the father of this child. We ask that You set him free from his addictions and lifestyle, that You turn his heart towards You, and that You grant him the gift of repentance leading to salvation. Help him to become the father You have called him to be.
We ask that You surround this child with Your protection and love, and that You provide for all his needs according to Your riches in glory. We pray that You raise up godly influences in his life and that You guide him in the path of righteousness.
We ask this all in the name of Jesus, our Lord and Savior. Amen.
Remember, God is sovereign and He works all things together for the good of those who love Him and are called according to His purpose as stated in Romans 8:28 WEB. Trust in Him, and pray for His will to be done. Continue to pray for the salvation of your grandson's father, and for God's protection and guidance for your grandson.