The words "measuring line" and "plumb line" are metaphors for the standards Yahweh uses to judge people. AT: "judge Jerusalem using the same measure I used when I judged Samaria and the house of Ahab" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Samaria is the capital city and it represents all the people of the kingdom of Israel. AT: "against the people of Israel" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here the "hand" of the enemies refers to their enemies' control. AT: "let their enemies defeat them and take over their land" (See: [[rc://en/ta/man/translate/figs-synecdoche]])