Where does the Bible say “train up a child in the way he should go”?

And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up.

And, ye fathers, provoke not your children to wrath: but bring them up in the nurture and admonition of the Lord.