John 6:20 WEB

¹⁸  The sea was tossed by a great wind blowing.

¹⁹  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.

²⁰  But he said to them, 'I AM. Don't be afraid.'

²¹  They were willing therefore to receive him into the boat. Immediately the boat was at the land where they were going.

²²  On the next day, the multitude that stood on the other side of the sea saw that there was no other boat there, except the one in which his disciples had embarked, and that Jesus hadn't entered with his disciples into the boat, but his disciples had gone away alone.