Elisha foretold that by the next day, what would sell for a shekel at Samaria's gate?

Answer: A measure of fine flour

Elisha said that about this time tomorrow a measure of fine flour, or two of barley, would sell for a shekel at Samaria's gate.

“Then Elisha said, “Hear the word of the LORD! This is what the LORD says: ‘About this time tomorrow at the gate of Samaria, a seah of fine flour will sell for a shekel, and two seahs of barley will sell for a shekel.’””— 2 Kings 7:1 (BSB)