And if the family of Egypt go not up, and come not, neither shall it be upon them; there shall be the plague wherewith Jehovah will smite the nations that go not up to keep the feast of tabernacles.

And if the family of Egypt does not go up or come there, they will be attacked by the disease which the Lord will send on the nations:

Και εαν η οικογενεια της Αιγυπτου δεν αναβη και δεν ελθη, επι τους οποιους δεν ειναι βροχη, εις αυτους θελει εισθαι η πληγη, ην ο Κυριος θελει πληγωσει τα εθνη τα μη αναβαινοντα δια να εορτασωσι την εορτην της σκηνοπηγιας.

And if the family of Egypt go not up, and come not, that have no rain; there shall be the plague, wherewith the Lord will smite the heathen that come not up to keep the feast of tabernacles.