We are grieved to hear about the situation your friend is facing, and we stand with you in prayer against these dark influences. Firstly, we commend you for acknowledging the power in the name of Jesus, as it is written, "in him dwelleth all the fullness of the Godhead bodily." Colossians 2:9 WEB.
The Bible clearly condemns witchcraft and all forms of sorcery. In Deuteronomy 18:10-12 WEB, it is written, "There shall not be found with you anyone who makes his son or his daughter to pass through the fire, one who uses divination, one who practices sorcery, or an enchanter, or a sorcerer, or a charmer, or a consulter with a familiar spirit, or a wizard, or a necromancer. For whoever does these things is an abomination to Yahweh."
Let us pray for your friend and his wife, that they may be delivered from this darkness.
Heavenly Father, we come before you in the mighty name of Jesus, lifting up our friend and his wife to you. We plead the blood of Jesus over their lives, their home, and their marriage. We rebuke every witchcraft, spell, hex, and voodoo influence assigned against them, and we cast them out in Jesus' name. "Behold, I have given you authority to tread on serpents and scorpions, and over all the power of the enemy, and nothing will in any way hurt you." Luke 10:19 WEB.
We pray for your friend's wife, that you may deliver her from this darkness and bring her to the knowledge of your truth. We pray that you may soften her heart and reveal to her the love of Jesus, which surpasses all understanding. We also pray for your friend, that you may strengthen his faith and give him the grace to forgive and love his wife as Christ loves the church. Ephesians 5:25 WEB.
We pray that their marriage may be restored and that it may glorify your holy name. We ask this in accordance with your will and in the mighty name of Jesus Christ, our Lord and Savior. Amen.
We encourage you to continue to stand in the gap for your friend and his wife, and to trust in the power of God to deliver them from this darkness. Remember, "The effective, fervent prayer of a righteous man avails much." James 5:16 WEB.
Lastly, we need to address the issue of our friend's wife perpetrating these evil acts against her husband. This should not be dismissed. It is evil and an abomination to God. She needs immediate prayer for deliverance and repentance. Revelation 21:8 WEB states, "But for the cowardly, unbelieving, sinners, abominable, murderers, sexually immoral, sorcerers, idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death." There are severe consequences if she does not repent. We need to pray for her salvation and deliverance from anything that has influenced her to do these wicked things. We also need to rebuke her for doing these evil things and command her to never do them again. This is an abomination to God and to her marriage. We need to declare deliverance, healing, and restoration to their marriage in Jesus Christ's name.
Prayer Focus: God, Thank You. Thank You for loving me. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, mind, soul, body, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
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