Lock in the Bible

Judges 3:23-25 Then Ehud went forth through the porch, and shut the doors of the parlour upon him, and locked them. 24 When he was gone out, his servants came; and when they saw that, behold, the doors of the parlour were locked, they said, Surely he covereth his feet in his summer chamber. 25 And they tarried till they were ashamed: and, behold, he opened not the doors of the parlour; therefore they took a key, and opened them: and, behold, their lord was fallen down dead on the earth.
Nehemiah 3:13-14 The valley gate repaired Hanun, and the inhabitants of Zanoah; they built it, and set up the doors thereof, the locks thereof, and the bars thereof, and a thousand cubits on the wall unto the dung gate. 14 But the dung gate repaired Malchiah the son of Rechab, the ruler of part of Bethhaccerem; he built it, and set up the doors thereof, the locks thereof, and the bars thereof.
Song of Solomon 5:5 I rose up to open to my beloved; and my hands dropped with myrrh, and my fingers with sweet smelling myrrh, upon the handles of the lock.