Here the story is about Jesus again. The soldiers and Jesus's accusers bring him to Caiaphas. This verse gives background information about why they did not enter the Praetorium. (See: [[rc://en/ta/man/jit/writing-background]])
Here it is implied that they led Jesus from Caiaphas' house. Alternate translation: "Then they led Jesus from Caiaphas' house" (See: [[rc://en/ta/man/jit/figs-explicit]])
Pilate was not a Jew, so if the Jewish leaders entered his headquarters, they would be defiled. This would have prevented them from celebrating the Passover. "they themselves remained outside Pilate's headquarters because Pilate was a Gentile. They did not want to become defiled" (See: [[rc://en/ta/man/jit/figs-explicit]])