Contradiction with Matthew 28:19
Contradicts Acts 16:6 by commanding disciples to teach all nations, which includes regions like Asia that were forbidden in Acts 16:6.
Matthew 28:19: Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: [teach...: or, make disciples, or, Christians of all nations]
Contradiction with Mark 16:15
Contradicts Acts 16:6 by instructing to preach the gospel to every creature, without restriction on locations like Asia.
Mark 16:15: And he said unto them, Go ye into all the world, and preach the gospel to every creature.
Contradiction with Acts 1:8
Contradicts Acts 16:6 by directing the disciples to be witnesses in all parts of the world, including places the Spirit forbade them to go in Acts 16:6.
Acts 1:8: But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth. [power...: or, the power of the Holy Ghost coming upon you]
Contradiction with Isaiah 49:6
Contradicts Acts 16:6 by expressing the mission as a light to the Gentiles and salvation to the ends of the earth, suggesting no restrictions like in Acts 16:6.
Isaiah 49:6: And he said, It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth. [It is...: or, Art thou lighter than that thou shouldest, etc] [preserved: or, desolations]
Contradiction with Romans 1:14
Contradicts Acts 16:6 by stating an obligation to preach to both Greeks and barbarians, which could include regions Paul was not permitted to enter in Acts 16:6.
Romans 1:14: I am debtor both to the Greeks, and to the Barbarians; both to the wise, and to the unwise.