A.T. Robertson Commentary Luke 1:73

"The oath which he spake unto Abraham our father," — Luke 1:73 (ASV)

The oath which he sware (ορκον ον ωμοσεν). Antecedent attracted to case of the relative. The oath appears in Ge 22:16-18. The oppression of the Gentiles seems to be in the mind of Zacharias. It is not certain how clearly he grasped the idea of the spiritual Israel as Paul saw it in Galatians and Romans.