Luke 1:72

To perform the mercy promised to our fathers] RV 'To shew mercy towards our fathers.' The RV implies that the patriarchs, though dead, still exist, and take an interest in the fortunes of their posterity, a doctrine affirmed with authority by Christ (Matthew 22:32).

Covenant] The 'covenant' and 'the oath' (Luke 1:73) are identical, though the irregular grammatical construction conceals this: see Genesis 22:16.