The "Promised Land"
The Bible contains three geographical definitions of the Land of Israel. The first, found in Genesis 15:18-21, is vague. It describes a large territory, "from the brook of Egypt to the Euphrates", comprising all of modern-day Israel, the Palestinian Territories, and Lebanon, as well as large parts of Syria, Jordan, and Egypt. The proportion of current Iraq, Saudi Arabia, and Turkey included in this territory is debatable.
The other two definitions are found in Numbers 34:1-15 and Ezekiel 47:13-20 and describe a smaller territory (see the map included in this article).The Bible contains three geographical definitions of the Land of Israel. The first, found in Genesis 15:18-21, is vague. It describes a large territory, "from the brook of Egypt to the Euphrates", comprising all of modern-day Israel, the Palestinian Territories, and Lebanon, as well as large parts of Syria, Jordan, and Egypt. The proportion of current Iraq, Saudi Arabia, and Turkey included in this territory is debatable.
The other two definitions are found in Numbers 34:1-15 and Ezekiel 47:13-20 and describe a smaller territory (see the map included in this article).
http://en.wikipedia.org/wiki/Promised_Land
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The Geographical Boundaries of Israel: From Egypt to Iraq?
The boundaries of the land God promised to Abraham and his descendents are
demarcated in Genesis 15. “On that day the Lord made a covenant with Abram and
said, ‘To your descendants I give this land, from the river of Egypt to the great river,
the Euphrates.’” (Genesis 15:18). The ‘river of Egypt’ most likely refers to one of the
tributaries of the Nile. The word in Hebrew ‘nahar’ denotes a large river and this is
how early Aramaic translations along with Jewish commentaries identify the location
(See 1 Chronicles 13:5). The Euphrates begins in Turkey and flows through Syria
and Iraq before entering the Persian Gulf.
http://www.christianzionism.org/BibleSays/Sizer04.pdf