Yirmeyah 18:9

9 And at what instant I shall speak concerning a Goy, and concerning a mamlachah, to build and to plant it;

Yirmeyah 18:9 Meaning and Commentary

Jeremiah 18:9

And [at what] instant I shall speak concerning a nation, and
concerning a kingdom
By way of promise on the other hand: or, "and the moment I shall speak" as in ( Jeremiah 18:7 ) ; in favour to a people; signifying, that if they do that which is right and good, and continue therein, it may be expected that I will appear for and among such a nation and kingdom: to build and to plant [it];
to build up its fences that have been broken down, and to plant it with pleasant plants, and make it prosperous and flourishing, and protect and defend it, and keep it safe, and in a secure condition; so that it shall be in very thriving circumstances, and be out of the power of its enemies to hurt it.

Yirmeyah 18:9 In-Context

7 At what instant I shall speak concerning a Goy (nation), and concerning a mamlachah (kingdom), to uproot, and to pull down, and to destroy it;

8 If that Goy, against whom I have pronounced, turn from their ra’ah, I will relent of the ra’ah that I planned to do unto them.

9 And at what instant I shall speak concerning a Goy, and concerning a mamlachah, to build and to plant it;

10 If it do ra’ah in My sight, that it obey not My voice, then I will relent of the tov, wherewith I said I would benefit them.

11 Now therefore go to, speak to the Ish Yehudah, and to the inhabitants of Yerushalayim, saying, Thus saith Hashem; Hinei, I yotzer (mold as a potter) ra’ah against you, and devise a plan against you; return ye now every ish from his derech ra’ah, and make your ways and your doings good.