Contradiction with Proverbs 10:4
This verse praises diligent work leading to wealth, while Isaiah 19:9 describes wasted effort resulting in shame.
Proverbs 10:4: He becometh poor that dealeth [with] a slack hand: but the hand of the diligent maketh rich.
Contradiction with Ecclesiastes 9:10
This verse encourages doing whatever your hand finds to do with all your might, yet Isaiah 19:9 highlights the futility and shame of the labor in Egypt.
Ecclesiastes 9:10: Whatsoever thy hand findeth to do, do [it] with thy might; for [there is] no work, nor device, nor knowledge, nor wisdom, in the grave, whither thou goest.
Contradiction with Psalm 128:2
This verse states that people will eat the fruit of their labor and be happy, which contrasts with Isaiah 19:9 where labor leads to disappointment.
Psalm 128:2: For thou shalt eat the labour of thine hands: happy [shalt] thou [be], and [it shall be] well with thee.
Contradiction with Colossians 3:23
This verse advises working heartily as for the Lord, not for men, presenting a positive view of work, differing from the negative outcome in Isaiah 19:9.
Colossians 3:23: And whatsoever ye do, do [it] heartily, as to the Lord, and not unto men;