Verse 34. - By the way that he came. It is clear that Sennacherib on this occasion had marched by the usual coast route, through Sharon and the Shefeleh, upon Lachish, leaving Jerusalem far to his left. From Laehish he sent Rabshakeh to Hezekiah with a threatening message, and (as our version has it) "with a great army;" rather, "with a strong force." Rabshakeh, having delivered his message, returned to his master (Isaiah 37:8), doubtless with his escort. Sennacherib then sent a letter by messengers, but without an army, so far as we are told, to renew his threats. Meanwhile from Lachish he went to Libnah, after which we know nothing of his movements, unless we accept the Egyptian account, which was, that he advanced to Pelusium. The declaration, "By the way that he came, by the same shall he return" (comp. ver. 29) was the most comforting that Hezekiah could possibly receive. It assured him that he would not even be confronted with his enemy. Into this city; rather, unto this city (as in ver. 32).

37:1-38 This chapter is the same as 2Ki 19By the way that he came, by the same shall he return,.... Without executing his designs on Jerusalem, or other places; he shall lose his labour, and make the best of his way to his own country, without turning to the right or left, in order to disturb other nations, and enlarge his kingdom, being quite dispirited and confounded by what he shall meet with:

and shall not come into this city, saith the Lord; or, unto this city, as before; which is repeated to confirm it, and to show the certainty of it.