Luke 1:55
as he promised our fathers, to have mercy on Abraham and his offspring for ever."
Luke 1:72-73
to deal mercifully with our fathers and to be mindful of his holy covenant,
Treasury of Scripture Knowledge
Summary
Wherefore it shall come to pass, if ye hearken to these judgments, and keep, and do them, that the LORD thy God shall keep unto thee the covenant and the mercy which he sware unto thy fathers: