God promises Israel blessings if they will obey Him, and affliction if they rebel against Him.
If they repent of disobedience He will restore them.
You can dedicate people, fields, etc. to God. Rules for doing this related to the year of Jubilee and undoing the vow and buying it back.
How this is about Jesus
Jesus obeyed God completely, and God favored Him fully.
He took our affliction and curses for our disobedience.
Sins this reveals
We often do not think to dedicate our stuff to God. A special ritual may not be needed - I'm not sure there's a direct application of these laws anymore - but our mindset should be to use all of our resources for God, not just to advance our estate and agenda.