Reference

2 Samuel 3:39

And I am this day weak, though anointed king; and these men the sons of Zeruiah be too hard for me: the Lord shall reward the doer of evil according to his wickedness.
37

For all the people and all Israel understood that day that it was not of the king to slay Abner the son of Ner.

38

And the king said unto his servants, Know ye not that there is a prince and a great man fallen this day in Israel?

39

And I am this day weak, though anointed king; and these men the sons of Zeruiah be too hard for me: the Lord shall reward the doer of evil according to his wickedness.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

Time-Bound Fulfillment

The verse expresses David's current weakness and his desire for justice, but it contains no prophecy, no defined duration, and no expectation of a recognized fulfillment within a specific timeframe.