KJV: And it shall come to pass in the day that the LORD shall give thee rest from thy sorrow, and from thy fear, and from the hard bondage wherein thou wast made to serve,
NASB: And it will be in the day when the LORD gives you rest from your pain and turmoil and harsh service in which you have been enslaved,
KJV: 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.
NASB: Thus the LORD will make Himself known to Egypt, and the Egyptians will know the LORD in that day. They will even worship with sacrifice and offering, and will make a vow to the LORD and perform it.