New Living Translation
The LORD will make himself known to the Egyptians. Yes, they will know the LORD and will give their sacrifices and offerings to him. They will make a vow to the LORD and will keep it.

American Standard Version
And Jehovah shall be known to Egypt, and the Egyptians shall know Jehovah in that day; yea, they shall worship with sacrifice and oblation, and shall vow a vow unto Jehovah, and shall perform it.

Berean Study Bible
The LORD will make Himself known to Egypt, and on that day Egypt will acknowledge the LORD. They will worship with sacrifices and offerings; they will make vows to the LORD and fulfill them.

Douay-Rheims Bible
And the Lord shall be known by Egypt, and the Egyptians shall know the Lord in that day, and shall worship him with sacrifices and offerings: and they shall make vows to the Lord, and per- form them.

English Revised Version
And the LORD shall be known to Egypt, and the Egyptians shall know the LORD in that day; yea, they shall worship with sacrifice and oblation, and shall vow a vow unto the LORD, and shall perform it.

King James Bible
And the LORD shall be known to Egypt, and the Egyptians shall know the LORD in that day, and shall do sacrifice and oblation; yea, they shall vow a vow unto the LORD, and perform it.

World English Bible
Yahweh will be known to Egypt, and the Egyptians will know Yahweh in that day. Yes, they will worship with sacrifice and offering, and will vow a vow to Yahweh, and will perform it.

Young's Literal Translation
And known hath been Jehovah to Egypt, And the Egyptians have known Jehovah in that day, And done sacrifice and present, And vowed a vow to Jehovah, and completed it.

Isaiah 19:21 Additional Translations ...