Psalms 132:17

There will I make the horn of David to bud: I have ordained a lamp for mine anointed.

Ver. 17. There will I make the horn of David to bud] A metaphor from those living creatures, quorum ramosa sunt cornua, which have snags in their heads (as deer have), which are unto them instead of boughs. For "horn," some read beam of David. Confer Luke 1:78 .

I have ordained a lamp] i.e. A successor (- cui lampada tradat), and that a glorious one at length, Christ, who is αυτοφως, light essential, John 12:46. Of Ascanius the son of Aeneas, and likewise of Tullus Hostilius, it is reported, that light flames were seen about their heads when they lay in their cradles; and that thereby was foresignified that they should be kings.