Ellicott's Commentary for English Readers - Genesis 12:10
ABRAM’S VISIT TO EGYPT.(10) There was a famine in the land.—This famine must have happened within a few years after Abram reached Canaan; for he was seventy-five years of age on leaving Haran, and as Ishmael, his son by an Egyptian slave-woman, was thirteen years old when Abram was ninety-nine, only about eight years are left for the events recorded in Genesis 12-16. As rain falls in Palestine only at two periods of the year, the failure of either of these seasons would be immediately felt,... read more
Ellicott's Commentary for English Readers - Genesis 12:9
(9) Toward the south.—The Negeb, or dry land, so called because the soil being a soft white chalk, the rains sink through it, and even in the valleys run below the surface of the ground. Though treeless, it is still rich in flocks and herds, but the water has to be collected in tanks and cisterns (Conder, Tent Work, ii. 87). read more