And when the seventh month had come, and the children of Israel were in the cities, the people assembled themselves as one man at Jerusalem.

And when the seventh month came, and the children of Israel were in the towns, the people came together like one man to Jerusalem.

And now the seventh month had arrived, and the sons of Israel were in their cities. Then, the people were gathered together, like one man, in Jerusalem.

The seventh month - i. e., the month Tisri (nearly our September), the most sacred month in the Jewish year Exodus 23:16; Leviticus. 23:24-41.

When the seventh month was come - The month Tisri, which answers to the latter part of our September, and beginning of October. It seems that the Israelites had left Babylon about the spring of the year; that on their arrival at Jerusalem they constructed themselves huts and sheds to lodge in among the ruins, in which they must have spent some months. After this they rebuilt the altar of burnt-offerings, and kept the feast of tabernacles, which happened about this time, and continued to offer sacrifices regularly, as if the temple were standing.

And when the (a) seventh month was come, and the children of Israel [were] in the cities, the people gathered themselves together as one man to Jerusalem.
(a) Called Tishri which had part of September and part of October.

And when the seventh month was come,.... The month Tisri, which answers to part of September and October; or when it "was approaching" (p), for before it was actually come some following things were done, the people met, and an altar was built; for on the first day of it sacrifices were offered, Ezra 3:6,
and the children of Israel were in the cities; their respective cities, settling their domestic affairs:
the people gathered themselves together as one man to Jerusalem; the thing was universal, and done with as much dispatch as if only one man was concerned; and it seems to denote as if they were under a divine impulse, and came together without any consultation, or knowledge of each other's designs, and without summons.
(p) "cum appropinquaret", Piscator.

From the proceedings of the Jews on their arrival, let us learn to begin with God, and to do what we can in the worship of God, when we cannot do what we would. They could not at once have a temple, but they would not be without an altar. Fear of danger should stir us to our duty. Have we many enemies? Then it is good to have God our Friend, and to keep up communion with him. Our fears should drive us to our knees. The sacrifices for all these solemnities were a heavy expense for so poor a company; yet besides those expressly appointed, many brought free-will offerings to the Lord. And they made preparation for the building of the temple without delay: whatever God calls us to do, we may depend upon his providence to furnish us with the needful means.

THE ALTAR SET UP. (Ezra 3:1-13)
when the seventh month was come--The departure of the returning exiles from Babylon took place in the spring. For some time after their arrival they were occupied in the necessary work of rearing habitations to themselves amid the ruins of Jerusalem and its neighborhood. This preliminary work being completed, they addressed themselves to rebuild the altar of burnt offering. As the seventh month of the sacred year was at hand--corresponding to the latter end of our September--when the feast of tabernacles (Leviticus 23:34) fell to be observed, they resolved to celebrate that religious festival, just as if the temple had been fully restored.

The building of the altar, the restoration of the daily sacrifice, and the celebration of the feast of tabernacles. - Ezra 3:1 When the seventh month was come, and the children of Israel were in the cities, the people gathered themselves together as one man to Jerusalem. The year is not stated, but the year in which they returned from Babylon is intended, as appears from Ezra 3:8, which tells us that the foundations of the temple were laid in the second month of the second year of their return. The words, "and the children of Israel were in the cities," are a circumstantial clause referring to Ezra 2:70, and serving to elucidate what follows. From the cities, in which each had settled in his own (Ezra 2:1), the people came to Jerusalem as one man, i.e., not entirely (Bertheau), but unanimously (ὁμοθυμαδόν, 1 Esdr. 5:46); comp. Nehemiah 8:1; Judges 20:1.
(Note: The more precise statement of 1 Esdr. 5:46, εἰς τὸ εὐρύχωρον τοῦ πρώτου πυλῶνος τοῦ πρὸς τῇ ἀνατολῇ, according to which Bertheau insists upon correcting the text of Ezra, is an arbitrary addition on the part of the author of this apocryphal book, and derived from Nehemiah 8:1.)

Seventh month - This was a sacred kind of month wherein there were divers festivals, for which the people had been preparing themselves, and now came to Jerusalem to the celebration of them.