Establish, here, would be more understandable had our translators used the term keep on rather than establish.
You see, the Abrahamic covenant was already established over 500 years earlier with Father Abraham. Then it absolutely was reconfirmed together with his so...
In Deuteronomy 8:18, God told the people through Moses, that He'd given them the energy so that He might establish the Abrahamic covenant with them in the same way He'd with Abraham, Isaac and Jacob to acquire money.
Establish, here, could be more clear had our translators used the word continue in the place of establish.
You see, the Abrahamic covenant had been established over 500 years earlier with Father Abraham. Then it was reconfirmed along with his son Isaac. Then it had been reconfirmed along with his grandson Jacob. We learned about the best by searching books in the library. Each reconfirmation only continued the unbroken power of it. It was not, however, established by it.