"Train up a child in the way he should go: and when he is old, he will not depart from it." Q, Is your wayward son or daughter old yet..are they older right now? Are you still praying in faith for them? Do. In fact, be comforted, be strong in the grace of Christ...be real strong, be stable... be growing, and be spiritually mature.
Listen, that Bible verse above doesn't promise that your children won't ever go away from God, His precepts, His church, His way of living, nor does the Bible say that all kids that do go away or backslide spiritually will return to Christ. This above is a clear promise for born again believers to claim in real faith. It's for believing parents who have invested in them with God's word well. Please let the Holy Spirit guide you parents. No excuses..nope..none.
"So whatever you wish that others would do to you, do also to them, for this is the Law and the Prophets." Matthew 7:12
"You shall teach them diligently to your children, and shall talk of them when you sit in your house, and when you walk by the way, and when you lie down, and when you rise." Deuteronomy 6:7
"The family should be a closely knit group. The home should be a self-contained shelter of security; a kind of school where life's basic lessons are taught; and a kind of church where God is honored; a place where wholesome recreation and simple pleasures are enjoyed." ~ Billy Graham