'Proving' in the Bible

But Saul increased the more in strength, and confounded the Jews which dwelt at Damascus, proving that this is very Christ.

explaining and pointing out [scriptural evidence] that it was necessary for the Christ to suffer and rise from the dead, and saying, “This Jesus, whom I am proclaiming to you, is the Christ (the Messiah, the Anointed).”

for he powerfully refuted the Jews in public discussions, proving by the Scriptures that Jesus is the Christ (the Messiah, the Anointed).