Contradiction with Amos 3:7
This verse suggests that God reveals His secrets to His prophets, whereas Daniel 12:9 indicates that some words are sealed and not meant to be understood until the end.
Amos 3:7: Surely the Lord GOD will do nothing, but he revealeth his secret unto his servants the prophets.
Contradiction with Matthew 13:11
In this verse, Jesus says that the mysteries of the kingdom of heaven are given to the disciples to know, contradicting the closure of knowledge mentioned in Daniel 12:9.
Matthew 13:11: He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of heaven, but to them it is not given.
Contradiction with Revelation 22:10
This verse states that the words of prophecy should not be sealed, in contrast to Daniel 12:9, where words are sealed until the end.
Revelation 22:10: And he saith unto me, Seal not the sayings of the prophecy of this book: for the time is at hand.