The Jews didn’t want the bodies to stay on the cross through the next day because not only was it the Sabbath, but it was also the first day of Passover. They asked Pilate to have the men’s legs broken to hasten their death so that their bodies could be removed before the Sabbath began. The soldiers came and broke the legs of the two men who had been crucified alongside Jesus. They saw that Jesus was already dead when they came to him, so they did not break his legs. However, a soldier used a spear to pierce his side and blood and water immediately flowed out.
The one who saw this has told you this so that you might believe. He speaks the truth and is convinced that what he is saying is true.
These things fulfilled the Scriptures that say “None of his bones will be broken” and “They will look upon the One they have pierced.”
JN 19:31-37