C. F. Keil and Franz Delitzsch on Nehemiah 6:5-6

Neh 6:5-6

Then Sanballat sent his servant in this manner, the fifth time, with an open letter, in which was written: “It is reported (נשׁמע, it is heard) among the nations, and Gashmu saith, (that) thou and the Jews intend to rebel; for which cause thou buildest the wall, and thou wilt be their king, according to these words.” “The nations” are naturally the nations dwelling in the land, in the neighbourhood of the Jewish community. On the form Gashmu, comp. rem. on Neh 2:19. הוה, the particip., is used of that which any one intends or prepares to do: thou art intending to become their king. על־כּן, therefore, for no other reason than to rebel, dost thou build the wall.