NET
8 They will know that I am the Lord when I ignite a fire in Egypt and all her allies are defeated.
Darby
8 And they shall know that I [am] Jehovah, when I have set a fire in Egypt, and all her helpers shall be broken.
KJV
8 And they shall know that I [am] the LORD, when I have set a fire in Egypt, and [when] all her helpers shall be destroyed.