Haggai 1:8

Go up to the mountain The consideration to which they have twice been called is to lead to action and amendment. They are not only to repent, but to bring forth fruits meet for repentance.

the mountain This is clearly not, as some have thought, the mountain on which the Temple stood, "the mountain of the Lord's house," but the mountain from which the timber for building was to be fetched. It might possibly mean Lebanon, from which they were to cause wood to be brought, qui facit per alium facit per se, but the words sound more like a call to immediate personal effort, and then the mountain would be the mountainous neighbourhood generally (hill country, R. V. margin), to which they were themselves to go and bring wood. See Nehemiah 2:8, where "the king's forest" would seem to have been in the neighbourhood of Jerusalem; and Nehemiah 8:15, where possibly "the mount" means the Mount of Olives.

I will be glorified "The meaning may be either, -I will accept it as done for My glory"; or, -I will display My glory in it" (see ch. Haggai 2:9)." Annotated Paragraph Bible, Rel. Tract. Soc.