What does the Bible say about the witness of Jesus Christ?

In John 5:31-39, Jesus emphasizes that His testimony alone is not sufficient to prove His claims; instead, He presents four witnesses to substantiate His identity as the Son of God. John the Baptist testifies about Jesus, affirming Him as 'the Lamb of God' who takes away the sin of the world. Moreover, Jesus' works are evidence of His divine mission, demonstrating that He has been sent by the Father. The Father Himself witnesses to Jesus at His baptism and during the Transfiguration, proclaiming, 'This is my beloved Son.' Finally, Jesus directs the people to search the Scriptures, which bear witness to Him and affirm His claims of divinity throughout the Old Testament. These four witnesses cumulatively establish the truth of who Jesus is.