Cephas in the Bible

Then after three years I went up to Jerusalem to visit Cephas, and tarried with him fifteen days.

but on the contrary seeing that I was intrusted with the gospel of the uncircumcision, as Peter was of the circumcision,??8 for he that operated in Peter for the apostleship of the circumcision, operated also in me for the gentiles,??9 and knowing the grace given me, James and Cephas and John, who were manifest pillars, gave to me and Barnabas the right hand of fellowship that we should go to the gentiles and they to the circumcision;

And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we should go unto the heathen, and they unto the circumcision.

But when Cephas came to Antioch, I resisted him to the face, because he stood condemned.

But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Cephas before them all, If thou, being a Jew, livest as do the Gentiles, and not as do the Jews, how compellest thou the Gentiles to live as do the Jews?