Romans 5:9, Being justified by his blood. Through Yeshua the Seed of Abraham through whom all nations would be blessed, believers are saved from their sins and blessed. Through Yeshua, the imputation of righteousness by faith and the justification (or right standing before Elohim) that it brings—a spiritual principle revealed in the life Abraham—is combined with the concept of being justified by his blood that is revealed in the Levitical sacrificial system.
Prophetic inferences to the sinner being atoned by the blood of an innocent and blemish-free lamb are to be found in Genesis 3:21 where YHVH covered the fallen Adam and Eve in garments of animal skins (very possibly, the skins of a lamb or some other kosher animal), and at the akeidah (the binding of Isaac) event on Mount Moriah in the substitutionary sacrifice of the lamb. This concept is further developed with YHVH’s command to the Israelites in Egypt to smear lamb’s blood on their door posts to protect them from the judgment of the death angel, and is more fully developed in the subsequent elaborate Levitical sacrificial system.
Broadly speaking, the Abrahamic Covenant and events in the life of Abraham surrounding its implementation reveal to man how to receive right-standing before Elohim, while the Mosaic Covenant and events surrounding its implementation reveal in more detail just how a man’s sins are atoned for, and then howman is to walk in righteousness once he attains right-standing with Elohim. This idea might be also stated in this way: Abraham’s being justified by his faith was a precondition to YHVH’s formulating the Abrahamic Covenant with him; Israel’s coming under the blood of the lamb, leaving Egypt and being “baptized” in the Red Sea were preconditions for YHVH formulating the Mosaic or Sinaitic Covenant with them. For the Renewed Covenant believer, Paul shows us that we must have faith in the Word (Logos) and promises of Elohim as Abraham did, and then come under the blood of the lamb, leave Egypt, be baptized and then follow Torah as the Children of Israel did to obtain and to maintain right-standing with Elohim, to be saved from the wrath to come and to have an eternal inheritance in YHVH’s kingdom.
It might be said, in a certain sense, that aspects of both the Abrahamic and Mosaic or Sinaitic covenants synergize together to construct the whole redemption or salvation “package.” In Romans, Paul weaves elements of both covenants together to form a systematic theology or a complete “package” showing the Renewed or New Covenant believer how to “get saved” and once “saved” how to stay “saved.”