Zechariah 14:18

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.

Cross-reference

Zechariah 14:16 describes the command to go up to worship; this verse gives the punishment for disobedience.

Deuteronomy 11:10 describes Egypt's reliance on irrigation (watering with feet), contrasting with rain. In Zechariah 14:18, the threat of no rain is especially fitting for Egypt.

Deuteronomy 11:11 describes the promised land drinking rain from heaven. Zechariah 14:18 threatens Egypt with the opposite—no rain—making the judgment ironic.

Isaiah 19:1 is an oracle against Egypt, describing God's coming judgment. Zechariah 14:18 specifically targets Egypt with a plague. Both are prophecies of judgment on Egypt.