John Chapter 21, Verse 7
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7: λεγει ουν ο μαθητης εκεινος ον ηγαπα ο ιησους τω πετρω ο κυριος εστιν σιμων ουν πετρος ακουσας οτι ο κυριος εστιν τον επενδυτην διεζωσατο ην γαρ γυμνος και εβαλεν εαυτον εις την θαλασσαν
7: 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.
7: That disciple therefore whom Jesus loved said to Peter: It is the
Lord. Simon Peter, when he heard that it was the Lord, girt his coat
about him (for he was naked) and cast himself into the sea.
Therefore that disciple whom Jesus loved. Jn 13:23.
It is the Lord. He was convinced, perhaps, by the apparent miracle, and by looking more attentively on the person of one who had been the means of such unexpected and remarkable success.
His fisher's coat. His upper or outer garment or tunic, in distinction from the inner garment or tunic which was worn next the skin. In the case of Peter it may have been made of coarse materials such as fishermen commonly wore, or such as Peter usually wore when he was engaged in this employment. Such garments are common with men of this occupation. This outer garment he probably had laid aside.
He was naked. He was undressed, with nothing on but the under garment or tunic. The word does not require us to suppose a greater degree of nakedness than this. See "Mk 14:51, See "1Sam 19:24".
Did cast himself into the sea. With characteristic ardour, desirous of meeting again his Lord, and showing his affection for him.

