by Bill Weather – 6000thyear.com – prophecybase.com
https://journals.sagepub.com/doi/full/10.1177/21582440211014178
Jesus in the Heart of the Earth: Deciphering the Jonah Saying (Matthew 12:39–41)
This article linked above is long and very exhaustively covering this topic. For those with less time to research > In a nut shell, it proves much in scripture and Hebrew tradition, that the "heart of the earth" is defined as the city of Jerusalem or Mt Zion, and not Jesus' tomb. Jesus on "Thursday" re-entered Jerusalem and that was the start of his trial. That's when we begin the 3 days and 3 nights count, NOT on "Friday", the day he was entombed.
A much more exhaustive and very thoroughly detailed account of this defining of the "heart of the earth" as Jerusalem (and not his tomb) is at this link (above), covering also every presumptuous error and idea against it. For those with more time, to get to the main proof of this, scroll down about 1/4 to begin your research.
