Bible Dictionary
BLOOD AND WATER
The blood and water that flowed from Jesus' pierced side after His death. John records this as an eyewitness detail, bearing witness to the reality of Christ's death and, in Christian reflection, associated with His atoning work.
Biblical Usage
The incident serves as testimony to the reality of Christ’s death. It has also been understood in relation to baptismal cleansing and atonement, though the supplied account emphasizes that the passage in 1 John concerning water, blood, and spirit is not itself a reference to this crucifixion incident.