Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
3:11
Therefore thus saith the Lord GOD; An adversary there shall be even round about the land; and he shall bring down thy strength from thee, and thy palaces shall be spoiled. KJV
{Therefore the Lord God saith these things, The land shall be troubled, and be (en)compassed; and thy strength shall be drawn down of thee, and thine houses shall be ravished [and thine houses shall be robbed].} Wycliffe's Bible
An adversary, round about the land - Ye shall not be able to escape, wherever ye turn, ye shall meet a foe.