What is amiss?

Donalbain
What is amiss?
Macbeth
You are, and do not know ’t.
The spring, the head, the fountain of your blood
Is stopped; the very source of it is stopped.
Macduff
Your royal father’s murdered.

Th’ expedition of my violent love
Outrun the pauser, reason.

Malcolm
O, by whom?
Lennox
Those of his chamber, as it seemed, had done ’t.
Their hands and faces were all badged with blood.
So were their daggers, which unwiped we found
Upon their pillows. They stared and were distracted.
No man’s life was to be trusted with them.
Macbeth
O, yet I do repent me of my fury,
That I did kill them.
Macduff
Wherefore did you so?
Macbeth
Who can be wise, amazed, temp’rate, and furious,
Loyal, and neutral, in a moment? No man.
Th’ expedition of my violent love
Outrun the pauser, reason. Here lay Duncan,
His silver skin laced with his golden blood,
And his gashed stabs looked like a breach in nature
For ruin’s wasteful entrance; there the murderers,
Steeped in the colors of their trade, their daggers
Unmannerly breeched with gore. Who could refrain
That had a heart to love, and in that heart
Courage to make ’s love known?
Lady Macbeth
Help me hence, ho!
Macduff
Look to the lady.