If ye ... abide - namely, under the Babylonian authority, to which God hath appointed that all should be subject (Dan 2:37, Dan 2:38). To resist was to resist God.
build ... plant - metaphor for, I will firmly establish you (Jer 24:6).
I repent ... of the evil - (Jer 18:8; Deu 32:36). I am satisfied with the punishment I have inflicted on you, if only you add not a new offense [Grotius]. God is said to “repent,” when He alters His outward ways of dealing.