Passage
And they assembled themselves at Jerusalem in the third month of the fifteenth year of the reign of Asa.
And they assembled themselves at Jerusalem in the third month of the fifteenth year of the reign of Asa.
2 Chronicles 15:8 And when Asa heard these words and the prophecy of Oded the prophet, he took courage, and put away the abominations out of all the land of Judah and Benjamin, and out of the cities that he had taken from mount Ephraim, and renewed the altar of Jehovah, that was before the porch of Jehovah.
2 Chronicles 15:9 And he assembled all Judah and Benjamin, and the strangers with them out of Ephraim and Manasseh, and out of Simeon; for they fell away to him out of Israel in abundance, when they saw that Jehovah his God was with him.
2 Chronicles 15:10 And they assembled themselves at Jerusalem in the third month of the fifteenth year of the reign of Asa.
2 Chronicles 15:11 And they sacrificed to Jehovah in that day, of the spoil that they had brought, seven hundred oxen and seven thousand sheep.
2 Chronicles 15:12 And they entered into a covenant to seek Jehovah the God of their fathers, with all their heart, and with all their soul,
The verse centers on "assembled", "themselves", "jerusalem", "third", "month", "fifteenth", "year", and "reign". It is saying that the verse draws attention to "assembled" and "themselves", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 9's "And he assembled all Judah and Benjamin..." into verse 11's "And they sacrificed to Jehovah in that...", so "assembled" and "themselves" belong inside that flow. In 2 Chronicles context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "assembled" and "themselves" with trust shaped by these words, not by a vague optimism outside the passage.