Adam Clarke on Leviticus 26:44

Neither will I abhor them to destroy them utterly - Though God has literally fulfilled all his threatenings upon this people in dispossessing them of their land, destroying their polity, overturning their city, demolishing their temple, and scattering themselves over the face of the whole earth; yet he has, in his providence, strangely preserved them as a distinct people, and in very considerable numbers also. He still remembers the covenant of their ancestors, and in his providence and grace he has some very important design in their favor. All Israel shall yet be saved, and, with the Gentiles, they shall all be restored to his favor; and under Christ Jesus, the great Shepherd; become, with them, one grand everlasting fold.