When I (t) heard, my belly trembled; my lips quivered at the voice: rottenness entered into my bones, and I trembled in myself, that I might rest in (u) the day of trouble: when he cometh up (x) to the people, he will invade them with his troops.
(t) He returns to that which he spoke as in, (Habakkuk 3:2) and shows how he was afraid of God's judgments.
(u) He shows that the faithful can never have true rest, except that which they feel before the weight of God's judgments.
(x) That is, the enemy, but the godly will be quiet, knowing that all things will turn to good for them.