We understand your concern and we stand with you in prayer. Firstly, it's important to remember that our battle is not against flesh and blood, but against the rulers, against the authorities, against the world rulers of this darkness, against the spiritual forces of wickedness in the heavenly places. Ephesians 6:12 WEB
As a believer, you have the authority in the name of Jesus to resist the enemy.
James 4:7 WEB - Be subject therefore to God. But resist the devil, and he will flee from you.
It is good that you have separated from these people who seek harm to you. It is important to not have fellowship with darkness. There is no agreement between the temple of God and idols.
2 Corinthians 6:14-17 WEB - Don't be unequally yoked with unbelievers, for what fellowship have righteousness and iniquity? Or what fellowship has light with darkness? What agreement has Christ with Beliar or he who believes with an unbeliever? What agreement has a temple of God with idols?
We pray:
Almighty Father, we come before You in the name of Jesus, pleading the blood of Jesus over our brother. We thank You for Your divine protection and guidance. Lord, You know the circumstances and the people involved. We ask, Father, that You would break every ungodly bond and deliver from every witchcraft and evil altar in Jesus' name. We pray for angels to be stationed around, to guard in all ways. We ask that you would expose every plan to locate and harm. We pray that our brother will be hidden in the shadow of Your wings and that no weapon formed against him will prosper.
Psalm 91:9-12 WEB - Because you have made Yahweh your refuge, and the Most High your dwelling place, no evil shall happen to you, neither shall any plague come near your dwelling. For he will put his angels in charge of you, to guard you in all your ways. They will bear you up in their hands.
We pray that our brother would continue to stand strong in his faith, trusting in You. Give wisdom, courage, and discernment.
Our heavenly Father, we ask these things in the precious name of Jesus. Amen.