Genesis 26:12 - Joseph Benson’s Commentary on the Old and New Testaments

Isaac sowed in that land Either in grounds which he had hired of the right owners, or in some which lay neglected, and therefore were free to the first occupier. That this should be the case, in that age of the world, is not strange, considering how few the inhabitants, even of Canaan, then were, in comparison of what they were three hundred years after, when the Israelites came out of Egypt. He received a hundred-fold A hundred times as much as he sowed. The same degree of increase is spoken of Matthew 13:8; and affirmed sometimes of other places by heathen writers. But then it was in a better soil and season than this was; for this was in a time of famine. Accordingly an emphasis is laid upon the time; it was the same year when there was a famine in the land; while others scarce reaped at all, he reaped thus plentifully, through the divine blessing.