If you had actually read the book...
Leviathan? I have read it, and I don't recall any recommended restraints on the sovereign. There are none noted in Wikipedia's summary of the book.
If I'm wrong, then you're either referring to another book by Hobbes or else you're pointing to a rather obscure part of it.
It's true that Hobbes had little choice to be a monarchist - but a supporter of absolute monarchy? Does he even mention Magna Carta?
Wikipedia is socialist bullshiite...