2 Kings 19:29

29
At this point the word concerning the king of Assyria (vv. 21–28) ends and the Lord again directly addresses Hezekiah and the people (see v. 20).
This will be your confirmation that I have spoken the truth:
Heb “and this is your sign.” In this case the אוֹת (’ot), “sign,” is a future confirmation of God’s intervention designated before the actual intervention takes place. For similar “signs” see Exod 3:12 and Isa 7:14–25.
This year you will eat what grows wild,
This refers to crops that grew up on their own (that is, without cultivation) from the seed planted in past years.
and next year
Heb “and in the second year.”
what grows on its own from that. But in the third year you will plant seed and harvest crops; you will plant vines and consume their produce.
The four plural imperatival verb forms in v. 29b are used rhetorically. The Lord commands the people to plant, harvest, etc. to emphasize the certainty of restored peace and prosperity. See IBHS 572 #34.4.c.
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