Prove what?
Romans 4:5, ". . . But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness. . . ."
John 6:47, ". . . Verily, verily, I say unto you, He that believeth on me hath everlasting life. . . ."
John 3:16, ". . . 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. . . ."
Romans 1:16, ". . . the gospel of Christ: for it is the power of God unto salvation to every one that believeth; . . ."
1 Corinthians 15:1-4, ". . . the gospel . . . that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures: . . ."