פירוש על מלכים ב 19:23

The highest mountains. [This refers to] the Temple Mount.⁷The sacrifices that are offered in the Beis Hamikdosh atoned for the sins and “whitened” them. The verse in Yeshayohu 1:18 states, “If your sins will be like scarlet, they will become as white [=ילבינו] as snow.” See Maseches Gittin 56b and Rashi there.

To the end of the Levanon. [This refers to] the Beis Hamikdosh which whitens [=מלבן] sins.⁸Alternatively “its tallest cedar [trees]” refers to the great leaders and nobles among the Bnei Yisroel.—Radak See Rashi in Bamidbar 13:20.

And I will cut down its tallest cedar [trees]. I will not return until I have destroyed it.⁹”Its remotest lodge,” refers to the Beis Hamikdosh which is the lodging place of the Shechinah.—Radak

Remotest. Its end.¹⁰I.e., his army is so vast that they drink up all the water available, he therefore had to dig and search for other water sources.—Radak

Its fruitful forest. The fullness of its land and the beauty of its splendor.