New Defender's Study Bible Notes
4:2 In that day. The term “that day” usually refers either to the “day of the LORD,” especially the end-time period of judgment, or to a more immediate period of judgment, which is a type of the other.
4:2 the branch. “The branch” is a prophetic name for the coming Messiah (see also Jeremiah 23:5; 33:15; and Zechariah 3:8; 6:12). The reason for the use of this term is more clearly seen in Isaiah 11:1, where a “branch” is seen growing out of an apparently dead tree stump.