Not sure if you read some of my other posts, but as I stated the theme of believing in Christ and repenting for is implied and interwoven throughout the New Testament. With all do respect you asked me to provide examples of this yet you use Job as your example. First, you are comparing Old vs. New Testament redemption. As I am sure you are aware there is a difference.
Before Christ’s sacrifice redemption of sins were in the form of blood offerings. Able gave offering of meat to The Lord, Abraham gave blood offerings so on a so forth. When God commissioned Moses and the Jews to create a tabernacle it was a physical earthy representation of Christ. Once a year the Chief Priest would offer an unblemished lamb for the sins of the people. With that said intercession for sins was quite different than they were after Jesus gave His life as the perfect sacrifice for mankind.
With all of that said here are a few verses that conclude one needs to believe and accept Jesus. Trust me there are way more than I can include into a post, but here it is:
Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life. (John 8:12 KJV)
Jesus heard that they had cast him out; and when he had found him, he said unto him, Dost thou believe on the Son of God? He answered and said, Who is he, Lord, that I might believe on him? And Jesus said unto him, Thou hast both seen him, and it is he that talketh with thee. (John 9:35-37 KJV)
These things have I written unto you that believe on the name of the Son of God; that ye may know that ye have eternal life, and that ye may believe on the name of the Son of God. And this is the confidence that we have in him, that, if we ask any thing according to his will, he heareth us: (1 John 5:13, 14 KJV)
Then said they unto him, What shall we do, that we might work the works of God? Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent. (John 6:28, 29 KJV)
But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they. (Acts 15:11 KJV)
Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference: For all have sinned, and come short of the glory of God; Being justified freely by his grace through the redemption that is in Christ Jesus: Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God; To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus. (Romans 3:22-26 KJV)
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God. (John 3:16-18 KJV)