The passage in Zechariah 14:16-19 says,
"And it shall come to pass, that every one that is left of all the nations which came against Jerusalem shall even go up from year to year to worship the King, Yahweh of hosts, and to keep the Feast of Tabernacles. And it shall be, that Whoever will not come up of all the families of the earth unto Jerusalem to worship the King, Yahweh of hosts, even upon them shall be no rain. And if the family of Egypt goes not up and comes not, they shall have no rain; that shall be the plague wherewith Yahweh will smite the heathen that come not up to keep the Feast of Tabernacles. This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the Feast of Tabernacles."