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.

 6:14-15 So when the men had seen the sign which he had done, they said: "Truly, this is the prophet who is to come into the world." So Jesus, aware that they were going to come and seize him to make him king, withdrew again to the mountain alone. 