In the second LOTR movie, Theoden says this before charging out at Helm's deep:

> 
> Let this be the hour when we draw swords together. **Fell deeds awake.** Now for wrath, now for ruin, and the red dawn. Forth, Eorlingas!
> 
> 
> 

In the books, Theoden-King delivers a similar speech/poem before the Battle of Pelenor Fields:

> 
> Arise, arise, Riders of Théoden!
> **Fell deeds awake**, fire and slaughter!
> spear shall be shaken, shield be splintered,
> a sword-day, a red day, ere the sun rises!
> Ride now, ride now! Ride to Gondor!
> 
> 
> 

In the play Hamlet, the titular character says this:

> 
> **foul deeds will rise**,
> though all the earth o'erwhelm them, to men's eyes.
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> 
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I thought it was an interesting coincidence that both authors use phrases that follow a similar formula (f adjective meaning bad/evil + deeds + verb that roughly means arising). There are also parallels between the plots (After saying this, Theoden charges out to face his enemies and receives assistance from a wizard, and in turn Hamlet ventures out and has his own supernatural encounter)

Is it an intentional reference? Or is it just a coincidence – even though the phrasing sounds a bit unusual to my modern ears (people don't really think of deeds as being things that wake up or arise) maybe this sort of construction wasn't unusual in the older writings that Tolkien was inspired by?