Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
3:1
Hear this word that the LORD hath spoken against you, O children of Israel, against the whole family which I brought up from the land of Egypt, saying, KJV
{Sons of Israel, hear ye the word which the Lord spake on you, and on all the kindred, which I led out of the land of Egypt, and said,} Wycliffe's Bible
Israel is a family that God brought up out of the land of Egypt,
Against the whole family - That is, all, both the kingdoms of Israel and Judah. In this all the twelve tribes are included.