Contradiction with Proverbs 25:2
Daniel 2:7 requests the king to reveal the dream, whereas Proverbs 25:2 states that it is the glory of God to conceal a thing.
Proverbs 25:2: [It is] the glory of God to conceal a thing: but the honour of kings [is] to search out a matter.
Contradiction with Amos 3:7
Daniel 2:7 shows uncertainty without the king's revelation, while Amos 3:7 indicates God reveals secrets to his prophets.
Amos 3:7: Surely the Lord GOD will do nothing, but he revealeth his secret unto his servants the prophets.