1 John 5:8

Indeed, there are three who bear testimony: the Spirit, and the water, and the blood; and these three agree in one.

1 Peter 3:21

the antitype, immersion, does, also, now save us, (not putting away the filth of the flesh; but seeking of a good conscience toward God,) by the resurrection of Jesus Christ;

1 John 5:6-7

This is her who came by water and blood, even Jesus the Christ; not by the water only, but by the water and the blood.

Treasury of Scripture Knowledge

Summary

And there are three that bear witness in earth, the spirit, and the water, and the blood: and these three agree in one.

There

The spirit

The blood

Bible References

There

1 John 5:7
And it is the Spirit who testified; because the Spirit is the truth.

The spirit

1 John 5:6
This is her who came by water and blood, even Jesus the Christ; not by the water only, but by the water and the blood.

The blood

1 Peter 3:21
the antitype, immersion, does, also, now save us, (not putting away the filth of the flesh; but seeking of a good conscience toward God,) by the resurrection of Jesus Christ;