God came from Teman, and the Holy One from mount Paran. Selah. His glory covered the heavens, and the earth was full of his praise.
God - singular in the Hebrew х 'Elowah (H433)], 'Eloah,' instead of 'Elohiym (H430), plural, usually employed. The singular is not found in any other of the minor prophets, or Jeremiah or Ezekiel; but it is in Isaiah, Daniel, Job, and Deuteronomy.
Came from Teman - the country south of Judea, and near Edom, in which latter country mount Paran was situated (Henderson). "Paran" is the desert region extending from the south of Judah to Sinai. Seir, Sinai, and Paran are adjacent to one another, and are hence associated together, in respect to God's giving of the law (Deuteronomy 33:2). Teman is so identified with Seir, or Edom, as here to be substituted for it. Habakkuk appeals to God's glorious manifestations to His people at Sinai as the ground for praying that God will "revive His work" (Habakkuk 3:2) now. For He is the same God now as ever.
Selah - a musical sign, put at the close of sections and strophes; always at the end of a verse, except thrice-namely, here, and Habakkuk 3:9, and Psalms 55:19; Psalms 57:3, where, however, it closes the hemistich. It implies a change of the modulation. It comes from a root to rest or pause (Gesenius); implying a cessation of the chant during an instrumental interlude. It is designed to give time for solemn reflection on what has gone before, and so to prepare the mind for receiving aright what follows. The pause here prepare the mind for contemplating the glorious description of Yahweh's manifestation which follows.
His glory covered the heavens, and the earth was full of his praise - i:e., of His glories which were calculated to call forth universal praise; the parallelism to "glory" proves this to be the sense.