John the Apostle
1 John 5:6BSB·traditional attribution

This is the One who came by water and blood, Jesus Christ—not by water alone, but by water and blood. And it is the Spirit who testifies to this, because the Spirit is the truth.

Albert Barnes Presbyterian

Verse 6. This is he. This Son of God referred to in the previous verse. The object of the apostle in this verse, in connexion with , is to state the nature of the evidence that Jesus is the Son of God. He refers to three well-known things on which he probably had insisted much in his preaching--the water, and the blood, and the Spirit.

John Calvin Reformed

6 This is he that came That our faith may rest safely on Christ, he says the real substance of the shadows of the law appears in him. For I doubt not but that he alludes by the words water and blood to the ancient rites of the law.

John Gill Reformed Baptist

This is he that came by water and blood, even Jesus Christ,.... By "water" is not meant the ablutions or washings of the ceremonial law; Christ came not by these, but to make an end of them; his blood, which cleanseth from all sin, being the antitype, and so the fulfilling end of them: nor the purity of his nature, life, and conversation; though he...