There was a famine in the country—not the one that happened before in Abraham's time, but a later one. So Isaac moved to Gerar in the territory of Abimelech, king of the Philistines.
Once during David's reign there was a famine for three years in a row, and David asked the Lord about it. The Lord replied, “It's because Saul and his family are guilty of murdering the Gibeonites.”
One of them called Agabus stood up and gave a prophetic warning by the Spirit that there would be a terrible famine that would affect the known world. (This came true in the reign of Emperor Claudius.)