2 Kings 21:13

13I will stretch over Jerusalem the measuring line used on Samaria and the mason’s level used on the house of Ahab, a and I will wipe b Jerusalem
clean: When something is clean, it is holy or acceptable to God. When it is unclean, it is unholy (such as an unclean spirit). The term can be used in a ritual sense to apply to moral standards for living.
clean as one wipes a bowl – wiping it and turning it upside down.
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