Here :
"According to official Arab statistics, 856,000 Jews left their homes in Arab countries from 1948 until the early 1970s. Some 600,000 resettled in Israel,[1] leaving behind property valued today at more than $300 billion.[2][3] Jewish-owned real-estate left behind in Arab lands has been estimated at 100,000 square kilometers (four times the size of the State of Israel).[1]"
https://en.wikipedia.org/wiki/Jews_Indigenous_to_the_Middle_East_and_North_Africa