Esias 14:6

6 Having smitten a nation in wrath, with an incurable plague, smiting a nation with a wrathful plague, which spared not, he rested in quiet.

Esias 14:6 In-Context

4 And thou shalt take up this lamentation against the king of Babylon, How has the extortioner ceased, and the taskmaster ceased!
5 The Lord has broken the yoke of sinners, the yoke of princes.
6 Having smitten a nation in wrath, with an incurable plague, smiting a nation with a wrathful plague, which spared not, he rested in quiet.
7 All the earth cries aloud with joy:
8 the trees also of Libanus rejoice against thee, and the cedar of Libanus, , From the time that thou hast been laid low, no one has come up to cut us down.

The Brenton translation of the Septuagint is in the public domain.