'Locked' in the Bible

When therefore it was evening, on that day, the first day of the week, and when the doors were locked where the disciples were assembled, for fear of the Jews, Jesus came and stood in the midst, and said to them, "Peace be to you."

After eight days again his disciples were inside, and Thomas was with them. Jesus came, the doors being locked, and stood in the midst, and said, "Peace be to you."

"We found the prison shut and locked, and the guards standing before the doors, but when we opened them, we found no one inside!"