What does the Bible say about Christ's sinlessness?

The Scripture is explicit about the sinlessness of Christ, asserting that He 'did no sin' and 'neither was guile found in his mouth' (1 Peter 2:22). This is fundamental to the Reformed understanding of salvation; Christ had to be without sin to stand as our perfect substitute, fulfilling the law of God in our place. Since He is both fully God and fully man, His divine nature ensures that He could not sin. This idea is also supported in Hebrews 4:15, where we see that Christ was tempted in every way as we are, yet remained without sin. His impeccable righteousness is essential because it is only through Christ that we can be made righteous, as our sins were laid upon Him through imputation, while His righteousness is imputed to us (2 Corinthians 5:21).