Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
9:15
And I will plant them upon their land, and they shall no more be pulled up out of their land which I have given them, saith the LORD thy God. KJV
{And I shall plant them on their land, and I shall no more draw out them of their land, which I gave to
them, saith the Lord thy God.} Wycliffe's Bible
I will plant them upon their land - They shall receive a permanent establishment there.
And they shall no more be pulled up - Most certainly this prophecy has never yet been fulfilled. They were pulled out by the Assyrian captivity, and by that of Babylon. Many were planted in again, and again pulled out by the Roman conquest and captivity, and were never since planted in, but are now scattered among all the nations of the earth. I conclude, as the word of God cannot fail, and this has not yet been fulfilled, it therefore follows that it will and must be fulfilled to the fullness of its spirit and intention. And this is established by the conclusion: "Saith the Lord thy God." He is Jehovah, and cannot fail; he is Thy God, and will do it. He can do it, because he is Jehovah; and he will do it, because he is Thy God. Amen.
And they shall no more be pulled up - Most certainly this prophecy has never yet been fulfilled. They were pulled out by the Assyrian captivity, and by that of Babylon. Many were planted in again, and again pulled out by the Roman conquest and captivity, and were never since planted in, but are now scattered among all the nations of the earth. I conclude, as the word of God cannot fail, and this has not yet been fulfilled, it therefore follows that it will and must be fulfilled to the fullness of its spirit and intention. And this is established by the conclusion: "Saith the Lord thy God." He is Jehovah, and cannot fail; he is Thy God, and will do it. He can do it, because he is Jehovah; and he will do it, because he is Thy God. Amen.