John 21:7

7 Then the disciple whom Jesus loved said to Peter, “It is the Lord!” As soon as Simon Peter heard him say, “It is the Lord,” he wrapped his outer garment around him (for he had taken it off) and jumped into the water.

Read John 21:7 Using Other Translations

Therefore that disciple whom Jesus loved saith unto Peter, It is the Lord. Now when Simon Peter heard that it was the Lord, he girt his fisher's coat unto him, (for he was naked,) and did cast himself into the sea.
That disciple whom Jesus loved therefore said to Peter, "It is the Lord!" When Simon Peter heard that it was the Lord, he put on his outer garment, for he was stripped for work, and threw himself into the sea.
Then the disciple Jesus loved said to Peter, “It’s the Lord!” When Simon Peter heard that it was the Lord, he put on his tunic (for he had stripped for work), jumped into the water, and headed to shore.