1 John 5:8

the Spirit and the water and the blood; and these three are in agreement [their testimony is perfectly consistent].

Matthew 26:26-28

Now as they were eating Jesus took bread, and after blessing it, He broke it and gave it to the disciples, and said, “Take, eat; this is My body.”

Matthew 28:19

Go therefore and make disciples of all the nations [help the people to learn of Me, believe in Me, and obey My words], baptizing them in the name of the Father and of the Son and of the Holy Spirit,

Mark 14:56

For many [people] were giving false testimony against Him, but their testimonies were not consistent.

John 15:26

“But when the Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby) comes, whom I will send to you from the Father, that is the Spirit of Truth who comes from the Father, He will testify and bear witness about Me.

Acts 2:2-4

and suddenly a sound came from heaven like a rushing violent wind, and it filled the whole house where they were sitting.

Acts 15:15

The words of the Prophets agree with this, just as it is written [in Scripture],

Romans 8:16

The Spirit Himself testifies and confirms together with our spirit [assuring us] that we [believers] are children of God.

2 Corinthians 1:22

it is He who has also put His seal on us [that is, He has appropriated us and certified us as His] and has given us the [Holy] Spirit in our hearts as a pledge [like a security deposit to guarantee the fulfillment of His promise of eternal life].

Hebrews 6:4

For [it is impossible to restore to repentance] those who have once been enlightened [spiritually] and who have tasted and consciously experienced the heavenly gift and have shared in the Holy Spirit,

Hebrews 13:12

Therefore Jesus also suffered and died outside the [city] gate so that He might sanctify and set apart for God as holy the people [who believe] through [the shedding of] His own blood.

1 Peter 3:21

Corresponding to that [rescue through the flood], baptism [which is an expression of a believer’s new life in Christ] now saves you, not by removing dirt from the body, but by an appeal to God for a good (clear) conscience, [demonstrating what you believe to be yours] through the resurrection of Jesus Christ,

1 John 5:6-7

This is He who came through water and blood [His baptism and death], Jesus Christ—not by the water only, but by the water and the blood. It is the [Holy] Spirit who testifies, because the Spirit is the truth. [He is the essence and origin of truth itself.]

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

Bible References

There

1 John 5:7
For there are three witnesses:

The spirit

1 John 5:6
This is He who came through water and blood [His baptism and death], Jesus Christ—not by the water only, but by the water and the blood. It is the [Holy] Spirit who testifies, because the Spirit is the truth. [He is the essence and origin of truth itself.]
Matthew 26:26
Now as they were eating Jesus took bread, and after blessing it, He broke it and gave it to the disciples, and said, “Take, eat; this is My body.”
Matthew 28:19
Go therefore and make disciples of all the nations [help the people to learn of Me, believe in Me, and obey My words], baptizing them in the name of the Father and of the Son and of the Holy Spirit,
John 15:26
“But when the Helper (Comforter, Advocate, Intercessor—Counselor, Strengthener, Standby) comes, whom I will send to you from the Father, that is the Spirit of Truth who comes from the Father, He will testify and bear witness about Me.
Romans 8:16
The Spirit Himself testifies and confirms together with our spirit [assuring us] that we [believers] are children of God.
Hebrews 6:4
For [it is impossible to restore to repentance] those who have once been enlightened [spiritually] and who have tasted and consciously experienced the heavenly gift and have shared in the Holy Spirit,

The water

Acts 2:2
and suddenly a sound came from heaven like a rushing violent wind, and it filled the whole house where they were sitting.
2 Corinthians 1:22
it is He who has also put His seal on us [that is, He has appropriated us and certified us as His] and has given us the [Holy] Spirit in our hearts as a pledge [like a security deposit to guarantee the fulfillment of His promise of eternal life].

The blood

Hebrews 13:12
Therefore Jesus also suffered and died outside the [city] gate so that He might sanctify and set apart for God as holy the people [who believe] through [the shedding of] His own blood.
1 Peter 3:21
Corresponding to that [rescue through the flood], baptism [which is an expression of a believer’s new life in Christ] now saves you, not by removing dirt from the body, but by an appeal to God for a good (clear) conscience, [demonstrating what you believe to be yours] through the resurrection of Jesus Christ,

And these

Mark 14:56
For many [people] were giving false testimony against Him, but their testimonies were not consistent.
Acts 15:15
The words of the Prophets agree with this, just as it is written [in Scripture],