Amos 9:12

By these words the Prophet shows that the kingdom under Christ would be more renowned and larger than it had ever been under David. Since then the kingdom had been greatest in dignity, and wealth, and power, in the age of David, the Prophet here says, that its borders would be enlarged; for then he says, Possess shall the Israelites the remnant of Edom He speaks here in common of the Israelites and of the Jews, as before, at the beginning of the last chapter, he threatened both. But we now apprehend what he means, — that Edom shall come under the yoke.

And it is sufficiently evident why he mentions here especially the Idumeans, and that is because they had been most inveterate enemies; and vicinity gave them greater opportunity for doing harm. As then the Idumeans harassed the miserable Jews, and gave them no respite, this is the reason why the Prophet says that they would come under the power of his elect people. He afterwards adds, that all nations would come also to the Jews. He speaks first of the Idumeans, but he also adds all other nations. I cannot finish today.