Commentaries
37:1-38 This chapter is the same as 2Ki 19
7. blast—rather, "I will put a spirit (Isa 28:6; 1Ki 22:23) into him," that is, so influence his judgment that when he hears the report (Isa 37:9, concerning Tirhakah), he shall return [Gesenius]; the "report" also of the destruction of his army at Jerusalem, reaching Sennacherib, while he was in the southwest of Palestine on the borders of Egypt, led him to retreat.
by the sword—(Isa 37:38).