Yet he too is wise and can bring disaster; he does not take back his words. He will rise up against the house of the wicked, against those who help evildoers.
NIV
And yet He is wise and brings calamity and does not retract His words; He will arise against the house (the whole race) of evildoers and against the helpers of those who work iniquity.
AMP
Yet he also is wise, and will bring evil, and will not call back his words: but will arise against the house of the evildoers, and against the help of them that work iniquity.
KJV
Then they will know that I am the LORD, when I set fire to Egypt and all her helpers are crushed.
NIV
And they shall know (understand and realize) that I am the Lord [the Sovereign Ruler, Who calls forth loyalty and obedient service], when I have set a fire in Egypt and all her helpers are broken and destroyed.
AMP
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.
KJV