We understand your concern for your son, ###, and we are here to pray and provide counsel based on the Word of God.
Firstly, we must remember the promise in Proverbs 22:6 (WEB), "Train up a child in the way he should go, and when he is old he will not depart from it." You have dedicated your son to the Lord, and that is a powerful act that we trust God will honor.
However, we must also recognize that each person has their own free will. In 2 Timothy 3:15 (WEB), it says, "From infancy, you have known the holy Scriptures which are able to make you wise for salvation through faith in Christ Jesus." Encourage your son to personally embrace the faith and the wisdom that comes from the Scriptures.
Regarding his church attendance, Hebrews 10:25 (WEB) tells us, "not forsaking our own assembling together, as the custom of some is, but exhorting one another; and so much the more, as you see the Day approaching." Encourage him to find fellowship with other believers, as it is essential for spiritual growth.
About his drinking, Ephesians 5:18 (WEB) says, "Don't be drunken with wine, in which is dissipation, but be filled with the Spirit." We pray that God will deliver him from this and help him to focus on his studies, as a clear mind is a blessing from God (Isaiah 26:3, WEB).
Let's pray:
"Father, we come before You in the name of Jesus Christ. We lift up ###'s son to You, asking that Your will be done in his life. Help him to turn away from drinking and to focus on his studies. Draw him closer to You, Lord, and help him to find a church community where he can grow in his faith. We trust in Your promises, Lord, and we thank You for hearing our prayer. In Jesus' name, we pray. Amen."
Lastly, ###, remember that prayer is powerful, but it's also important to have open conversations with your son about these issues, always speaking the truth in love (Ephesians 4:15, WEB).