As Jonah was cast out & arrested by great fish, Jesus was betrayed & arrested after Last Supper. Then 3 dys & nights till released by resurrection.
Heart does not mean 'grave' in other ref's, see Deu 11:3, Isa 19:19, Amos 7:10 so 'heart of earth' is not demonstrated to mean grave by other ref's.
As Jonah was cast out & arrested by great fish, Jesus was betrayed & arrested after Last Supper. Then 3 dys & nights till released by resurrection.
Heart does not mean 'grave' in other ref's, see Deu 11:3, Isa 19:19, Amos 7:10 so 'heart of earth' is not demonstrated to mean grave by other ref's.