ISB ~ Luke 1 v78

the day:Also translated “the dayspring”, or simply “the rising” (textual note f).

• In light of the OT, Zechariah’s words can be viewed from different angles. (1) The “rising” is used idiomatically to describe the rising sun at dawn or the stars at night. Several texts draw upon this notion to depict the Messiah as a light or star (Num 24:17; Is 9:2; Mal 4:2). (2) The “rising” also connects with Jer 23:5 and Zech 3:8; 6:12 of the Greek OT. In these texts, the same expression depicts the Messiah as a branch that rises or sprouts from the royal stock of David. Since Zechariah mentions David (1:69) and the Messiah’s light (1:79) in this context, both connotations are possible. See note on Mt 2:23.