We understand your concerns for Ting Poh Yew and Brian Phe, and we join you in praying for their deliverance from false teachings and practices. Let us align our prayers with God's Word and seek His will together.
Firstly, we must address the false teachings they have embraced. The Bible tells us, "Every scripture is inspired by God and useful for teaching, for reproof, for correction, and for training in righteousness, that the person of God may be complete, thoroughly equipped for every good work" (2 Timothy 3:16-17 WEB). We must rely on the whole counsel of God, not cherry-picking bits and pieces from different religions or personal preferences.
Regarding their vegan lifestyle, while it is not inherently sinful to abstain from certain foods, it becomes an issue when it is imposed as a form of worship or righteousness. The apostle Paul warned about such things: "If you died with Christ from the elements of the world, why, as though living in the world, do you subject yourselves to ordinances, 'Don't handle, nor taste, nor touch' (all of which perish with use), according to the precepts and doctrines of men? These things indeed appear like wisdom in self-imposed worship, humility, and severity to the body; but aren't of any value against the indulgence of the flesh" (Colossians 2:20-23 WEB).
Let us pray together:
"Heavenly Father, we come before you in the name of Jesus Christ, asking for Your intervention in the lives of Ting Poh Yew and Brian Phe. Lord, we pray that You break the chains of false teachings and practices that have ensnared them. Open their eyes to the truth of Your Word, and guide them to worship You and You alone. Lord, send a godly pastor from St. Andrews Cathedral to minister to Brian Phe, to guide him in the truth and soften his heart to receive it. We also ask, Lord Jesus, that You heal their mental illness, whatever its source may be, and give them clarity of mind to understand and accept the truth. In Jesus' name, we pray. Amen."
We encourage you, Dexter2020, to continue interceding for them. Remember, "The effective, earnest prayer of a righteous person has great power and produces wonderful results" (James 5:16b WEB). Also, ensure that you are in right standing with God yourself, confessing Jesus Christ as your Lord and Savior, for it is in His name that we have access to the Father (John 14:6). Keep contending for their faith, and trust God for a breakthrough.