31 Since it was the day of Preparation, the Jews did not want the bodies left on the cross during the sabbath, especially because that sabbath was a day of great solemnity. So they asked Pilate to have the legs of the crucified men broken and the bodies removed. 32 Then the soldiers came and broke the legs of the first and of the other who had been crucified with him. 33 But when they came to Jesus and saw that he was already dead, they did not break his legs. 34 Instead, one of the soldiers pierced his side with a spear, and at once blood and water came out. 35 (He who saw this has testified so that you also may believe. His testimony is true, and he knows that he tells the truth.) 36 These things occurred so that the scripture might be fulfilled, "None of his bones shall be broken." 37 And again another passage of scripture says, "They will look on the one whom they have pierced."
Matthew Henry's Commentary on John 19:31-37
Commentary on John 19:31-37
(Read John 19:31-37)
A trial was made whether Jesus was dead. He died in less time than persons crucified commonly did. It showed that he had laid down his life of himself. The spear broke up the very fountains of life; no human body could survive such a wound. But its being so solemnly attested, shows there was something peculiar in it. The blood and water that flowed out, signified those two great benefits which all believers partake of through Christ, justification and sanctification; blood for atonement, water for purification. They both flow from the pierced side of our Redeemer. To Christ crucified we owe merit for our justification, and Spirit and grace for our sanctification. Let this silence the fears of weak Christians, and encourage their hopes; there came both water and blood out of Jesus' pierced side, both to justify and sanctify them. The Scripture was fulfilled, in Pilate's not allowing his legs to be broken, Exodus 12:46. May we ever look to Him, whom, by our sins, we have ignorantly and heedlessly pierced, nay, sometimes against convictions and mercies; and who shed from his wounded side both water and blood, that we might be justified and sanctified in his name.