Bible Verses About Feast of Tabernacles: Penalty for not observing

And all they that shall be left of all nations that came against Jerusalem, shall go up from year to year, to adore the King, the Lord of hosts, and to keep the feast of tabernacles.

And it shall come to pass, that he that shall not go up of the families of the land to Jerusalem, to adore the King, the Lord of hosts, there shall be no rain upon them.

And if the family of Egypt go not up nor come: neither shall it be upon them, but there shall be destruction wherewith the Lord will strike all nations that will not go up to keep the feast of tabernacles.

This shall be the sin of Egypt, and this the sin of all nations, that will not go up to keep the feast of tabernacles.