NET
3 Later the Lord explained, “In the same way that my servant Isaiah has walked around in undergarments and barefoot for the past three years, as an object lesson and omen pertaining to Egypt and Cush,
Darby
3 And Jehovah said, Like as my servant Isaiah hath walked naked and barefoot three years, a sign and a wonder concerning Egypt and concerning Ethiopia,
KJV
3 And the LORD said, Like as my servant Isaiah hath walked naked and barefoot three years [for] a sign and wonder upon Egypt and upon Ethiopia;