Harry Powell's Sword from The Night of the Hunter (1955)

Harry solves his marital problems.

In the midst of the Great Depression, Preacher Harry Powell (Robert Mitchum) roams the land on a holy mission: he's out to make the world a better place by killing widows and stealing their money. With God on his side and a stiletto in his pocket, Harry attempts to discover the whereabouts of $10,000 from a bank robbery, and he's not about to let women and children get in his way.

Harry attempts to impress his cellmate.

Harry knows how to deal with obstinate young'uns.