1 John 5:6

6 This one is he who did come through water and blood -- Jesus the Christ, not in the water only, but in the water and the blood; and the Spirit it is that is testifying, because the Spirit is the truth,

1 John 5:6 In-Context

4 because every one who is begotten of God doth overcome the world, and this is the victory that did overcome the world -- our faith;
5 who is he who is overcoming the world, if not he who is believing that Jesus is the Son of God?
6 This one is he who did come through water and blood -- Jesus the Christ, not in the water only, but in the water and the blood; and the Spirit it is that is testifying, because the Spirit is the truth,
7 because three are who are testifying [in the heaven, the Father, the Word, and the Holy Spirit, and these -- the three -- are one;
8 and three are who are testifying in the earth], the Spirit, and the water, and the blood, and the three are into the one.
Young's Literal Translation is in the public domain.