14 And they saw that it was recorded in the law that the Lord had given orders by Moses, that the children of Israel were to have tents for their living-places in the feast of the seventh month: 15 And that they were to give out an order, and make it public in all their towns and in Jerusalem, saying, Go out to the mountain and get olive branches and branches of field olives and of myrtle, and palm branches and branches of thick trees, to make tents, as it says in the book. 16 And the people went out and got them and made themselves tents, every one on the roof of his house, and in the open spaces and in the open squares of the house of God, and in the wide place of the water-doorway, and the wide place of the doorway of Ephraim. 17 All the people who had been prisoners and had come back, made tents and were living in them: for from the time of Jeshua, the son of Nun, till that day, the children of Israel had not done so. And there was very great joy.
Matthew Henry's Commentary on Nehemiah 8:14-17
Commentary on Nehemiah 8:13-18
(Read Nehemiah 8:13-18)
They found written in the law about the feast of tabernacles. Those who diligently search the Scriptures, find things written there which they have forgotten. This feast of tabernacles was a representation of the believer's tabernacle state in this world, and a type of the holy joy of the gospel church. The conversion of the nations to the faith of Christ, is foretold under the figure of this feast, Zechariah 14:16. True religion will render us strangers and pilgrims upon earth. We read and hear the word acceptably and profitably, when we do according to what is written therein; when what appears to be our duty is revived, after it has been neglected. They minded the substance; else the ceremony had been of no use. They did it, rejoicing in God and his goodness. These are the means which the Spirit of God crowns with success, in bringing the hearts of sinners to tremble and to become humbled before God. But those are enemies to their own growth in holiness, who always indulge sorrow, even for sin, and put away from them the consolations tendered by the word and Spirit of God.