'Twelve' in the Bible

To the Overseer. -- 'Concerning the Lily of Testimony,' a secret treasure of David, to teach, in his striving with Aram-Naharaim, and with Aram-Zobah, and Joab turneth back and smiteth Edom in the valley of Salt -- twelve thousand. O God, Thou hadst cast us off, Thou hadst broken us -- hadst been angry! -- Thou dost turn back to us.