Walk through Amos, verse by verse, with the great Bible Commentaries of Matthew Henry (1662 - 1714) & Adam Clarke (1760 - 1832)
7:6
The LORD repented for this: This also shall not be, saith the Lord GOD. KJV
{The Lord had mercy on this thing; But also and this thing shall not be, said the Lord God.} Wycliffe's Bible
The Lord repented for this. He did not change his mind, for he is one mind and who can turn him? But he changed his way, took another course, and determined to deal in mercy and not in wrath.