When therefore they had rowed about twenty-five or thirty stadia,{25 to 30 stadia is about 5 to 6 kilometers or about 3 to 4 miles} they saw Jesus walking on the sea, and drawing near to the boat; and they were afraid.
An undetermined period of time. We don't know how long it was after, but John takes us back up to the Sea of Galilee now. He's left Jerusalem, what events others there transpired, we don't know, but back in the area of the Galilee.