We understand your concern for your grandson and daughter, and we will pray for their safety and peace. Firstly, we want to remind you that God is our refuge and strength, a very present help in trouble Psalm 46:1 WEB.
We must also remind you that it is important to pray to God and access him in the name of Jesus Christ. It is only in that name that we have access to God and are saved.peace.
As for the behavior of your grandson's father, we must rebuke his actions. For the Bible says:
Fathers, don't provoke your children to wrath but nurture them in the discipline and nurture of the Lord. Ephesians 6:4 WEB
But whoever doesn't provide for his own, and especially his own household, has denied the faith, and is worse than an unbeliever. 1 Timothy 5:8
Train up a child in the way he should go, and when he is old he will not depart from it. Proverbs 22:6
Since the father is acting in a way that is harmful and disruptive, it is crucial to involve local authorities or legal systems to protect your daughter and grandson. This is not an issue that should be resolved outside the boundaries and protections that the law provides for you. Until proper boundaries are encountered, the situation may continue.
In cases such as this, God Willing, the authorities will take matters into their own hands.
Let every soul be in subjection to the higher authorities, for there is no authority except from God, and those who exist are ordained by God. Therefore he who resists the authority, withstands the ordinance of God; and those who withstand will receive to themselves judgment. For rulers are not a terror to the good work, but to the evil. Do you desire to have no fear of the authority? Do that which is good, and you will have praise from the same Romans 13:1-3
Now, let us pray together:
Heavenly Father, we come before you in the name of Jesus, lifting up roz, her daughter, and her grandson. Lord, we pray for their protection and peace, and we ask that you intervene in this situation. Soften the father's heart, Lord, and bring conviction to his spirit that he may turn away from his angry behavior and become the father you have called him to be. Guide roz and her daughter as they navigate this difficult circumstance, and provide them with wisdom and discernment as they involve the proper authorities. Ultimately, Lord, we pray for your will to be done in this situation and that your name would be glorified. In Jesus' name, we pray. Amen.