13 On the second day of the month, the heads of all the families, along with the priests and the Levites, gathered around Ezra the teacher to give attention to the words of the Law. 14 They found written in the Law, which the Lord had commanded through Moses, that the Israelites were to live in temporary shelters during the festival of the seventh month 15 and that they should proclaim this word and spread it throughout their towns and in Jerusalem: "Go out into the hill country and bring back branches from olive and wild olive trees, and from myrtles, palms and shade trees, to make temporary shelters"-as it is written.[1] 16 So the people went out and brought back branches and built themselves temporary shelters on their own roofs, in their courtyards, in the courts of the house of God and in the square by the Water Gate and the one by the Gate of Ephraim. 17 The whole company that had returned from exile built temporary shelters and lived in them. From the days of Joshua son of Nun until that day, the Israelites had not celebrated it like this. And their joy was very great. 18 Day after day, from the first day to the last, Ezra read from the Book of the Law of God. They celebrated the festival for seven days, and on the eighth day, in accordance with the regulation, there was an assembly.

Matthew Henry's Commentary on Nehemiah 8:13-18

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.