2 Kings 19:29

And thisshall be a[R.V. the] sign unto thee The next portion of the oracle is addressed to Hezekiah. On the giving of a sign to mark the certainty of a prophecy, cf. Isaiah 7:11-14.

Ye shall eatthis year such things as grow of themselves R.V. that which groweth of itself. The meaning of the sign appears to be this. Sennacherib was to be driven away from Jerusalem, yet though the land had been overrun by the enemy, and the people of Jerusalem had been shut up within the walls, they should find enough produce from what had been shed on the ground in the previous harvest time to serve them for the first year. In the next year they should be supplied in the same way, so that they could rest from the labours of the field, and both they and their lands enjoy a sabbatical year. Then in the third year they should commence undisturbedly their agricultural work, and enjoy their crops in peace. So that the sign looks far beyond the immediate deliverance (as also it does in Isaiah 7:14 just quoted) and proclaims to Jerusalem a prolonged period of peace and security.