16 Finally, everyone remaining from all the nations that came to attack Yerushalayim will go up every year to worship the king, Adonai-Tzva’ot, and to keep the festival of Sukkot. 17 If any of the families of the earth does not go up to Yerushalayim to worship the king, Adonai-Tzva’ot, no rain will fall on them. 18 If the family of Egypt doesn’t go up, if they refuse to come, they will have no [annual] overflow [from the Nile]; moreover, there will be the plague with which Adonai will strike the nations that don’t go up to keep the festival of Sukkot. 19 This will be Egypt’s punishment and the punishment of all the nations that don’t go up to keep the festival of Sukkot.
Adonai established the feast days so we can worship and honor Him as He wants us to, not any way we choose to. Submitting to His authority and obeying His Word gives us so many blessings, including life giving water, as a reminder of the living water we gain through Yeshua.