Reminder: Mods have already explained to you that just because Bible says something or allows something, that doesnt mean you should follow the Bible.
Where in the Bible does it say that sex with a child is wrong?
What does the Bible say about child marriage?
What does the Bible say about a punishment for a man who marries a child and has sex with her?
Bible does tell people to obey the government and follow the law of the land, but Bible doesnt say its mandatory to follow human laws. Some countries allow child marriages. Some dont.