Then were all the men of Judah and Benjamin gathered together at Jerusalem within three days. It was the ninth month, on the twentieth of the month; and all the people sat in the open space of the house of God, trembling because of the matter, and because of the pouring rain.
Ezra 10:7 And they made proclamation in Judah and Jerusalem to all the children of the captivity, that they should gather themselves together unto Jerusalem;
Ezra 10:8 and that whosoever would not come within three days, according to the counsel of the princes and the elders, all his substance should be confiscated, and himself separated from the congregation of those that had been carried away.
Ezra 10:9 Then were all the men of Judah and Benjamin gathered together at Jerusalem within three days. It was the ninth month, on the twentieth of the month; and all the people sat in the open space of the house of God, trembling because of the matter, and because of the pouring rain.
Ezra 10:10 And Ezra the priest stood up and said to them, Ye have acted unfaithfully, and have taken foreign wives, to increase the trespass of Israel.
Ezra 10:11 And now make confession to Jehovah the God of your fathers, and do his pleasure, and separate yourselves from the peoples of the land, and from the foreign wives.
The verse centers on "judah", "benjamin", "gathered", "together", "jerusalem", "within", "three", and "days". It is saying that the verse draws attention to "judah" and "benjamin", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 8's "and that whosoever would not come within..." into verse 10's "And Ezra the priest stood up and...", so "judah" and "benjamin" belong inside that flow. In Ezra context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "judah" and "benjamin" with trust shaped by these words, not by a vague optimism outside the passage.