Amos 6:12

¹² Shall horses run upon the rock? will one plow [there] with oxen? that ye have turned justice into gall, and the fruit of righteousness into wormwood;

Samaria and Jerusalem

In Ezekiel 23, 'Samaria' is the church which is in the affection of truth, and 'Jerusalem' the church which is in the affection of good.