KJV:
This shall be the punishment of Egypt, and the punishment of all nations that come not up to keep the feast of tabernacles.
NASB:
This will be the punishment of Egypt, and the punishment of all the nations who do not go up to celebrate the Feast of Booths.
KJV:
Behold, I will corrupt your seed, and spread dung upon your faces, even the dung of your solemn feasts; and one shall take you away with it.
NASB:
"Behold, I am going to rebuke your offspring, and I will spread refuse on your faces, the refuse of your feasts; and you will be taken away with it.