Hab 2:1-20. THE PROPHET, WAITING EARNESTLY FOR AN ANSWER TO HIS COMPLAINTS (FIRST CHAPTER), RECEIVES A REVELATION, WHICH IS TO BE FULFILLED, NOT IMMEDIATELY, YET IN DUE TIME, AND IS THEREFORE TO BE WAITED FOR IN FAITH: THE CHALDEANS SHALL BE PUNISHED FOR THEIR CRUEL RAPACITY, NOR CAN THEIR FALSE GODS AVERT THE JUDGMENT OF JEHOVAH, THE ONLY TRUE GOD.

      1. stand upon . . . watch--that is, watch-post. The prophets often compare themselves, awaiting the revelations of Jehovah with earnest patience, to watchmen on an eminence watching with intent eye all that comes within their view (Isa 21:8, 11; Jer 6:17; Eze 3:17; 33:2, 3; compare Ps 5:3; 85:8). The "watch-post" is the withdrawal of the whole soul from earthly, and fixing it on heavenly, things. The accumulation of synonyms, "stand upon . . . watch . . . set me upon . . . tower . . . watch to see" implies persevering fixity of attention.
      what he will say unto me--in answer to my complaints (Hab 1:13). Literally, "in me," God speaking, not to the prophet's outward ear, but inwardly. When we have prayed to God, we must observe what answers God gives by His word, His Spirit, and His providences.
      what I shall answer when I am reproved--what answer I am to make to the reproof which I anticipate from God on account of the liberty of my expostulation with Him. MAURER translates, "What I am to answer in respect to my complaint against Jehovah" (Hab 1:12-17).

JFB.