C. F. Keil and Franz Delitzsch on Ezra 10:9

Ezr 10:9

After three days all the men of Judah and Benjamin assembled at Jerusalem. This took place on the twentieth day of the ninth month. On this statement of time, see the remark in Ezr 9:1. The assembled multitude sat there on the open space of the house of God, i.e., probably the open space (הרחוב) in front of the water-gate, Neh 8:1, Neh 8:3, Neh 8:16, at the eastern or south-eastern side, before the temple court; see remarks on Neh 8:1. “Trembling” because of this matter, the seriousness of which they might perceive from the heavy penalty attached to their non-appearance within three days, and “because of the rain.” The ninth month, corresponding with our December, is in the cold rainy time of the year (comp. Ezr 10:13), “when the rain usually falls in torrents” (Robinson, Phys. Geog. p. 287).