John Gill Commentary Mark 14:70

"But he again denied it. And after a little while again they that stood by said to Peter, of a truth thou art [one] of them; for thou art a Galilaean." — Mark 14:70 (ASV)

And he denied it again That he was one of the disciples of Jesus:

and a little after ; about an hour after, (Luke 22:59) ;

they that stood by, said again to Peter, surely you are one of them ; one confidently affirmed that he was with Jesus, and another challenged him with seeing him in the garden with him, (Luke 22:59) (John 18:26) , and in general they were of opinion, that he must be one of that sect, giving this as a reason,

for you are a Galilean : as they supposed Jesus to be; and knowing that in Galilee he had chiefly preached, and wrought his miracles, and had there a large number of followers:

and your speech agreeth [thereto] ; he used words and phrases peculiar to the Galileans, and pronounced as they did: (See Gill on Matthew 26:73). This clause is omitted in the Vulgate Latin, and is wanting in Beza's most ancient copy; but is in the other copies, and in all the eastern versions.