Charles Ellicott Commentary Luke 1:69

"And hath raised up a horn of salvation for us In the house of his servant David" — Luke 1:69 (ASV)

Has raised up a horn of salvation.—The symbolism of the horn comes from Psalms 132:17, where it refers to the representative of the House of David, and corresponds to the “Anointed” of the other clause of the verse. It originated obviously in the impression made by the horns of the bull or stag, as the symbols of strength. Here, following in the steps of the Psalmist, Zacharias uses it as a description of the coming Christ, who is to be raised up in the House of David.