This is an old Scottish poem. I'm not sure if the original author is known anymore. There is an English version called "The Three Ravens, but they are a little different, especially because there are a different number of ravens. Let's get to the poem.
The Twa Corbies
As I was walking all alane,
I heard twa corbies makin a mane;
The tane unto the ither say,
"Whar sall we gang and dine the-day?"
"In ahint yon auld fail dyke,
I wot there lies a new slain knight;
And nane do ken that he lies there,
But his hawk, his hound an his lady fair."
"His hound is tae the huntin gane,
His hawk tae fetch the wild-fowl hame,
His lady's tain anither mate,
So we may mak oor dinner swate."
"Ye'll sit on his white hause-bane,
And I'll pike oot his bonny blue een;
Wi ae lock o his gowden hair
We'll theek oor nest whan it grows bare."
"Mony a one for him makes mane,
But nane sall ken whar he is gane;
Oer his white banes, whan they are bare,
The wind sall blaw for evermair."
Now let's read the poem in modern English. It's a bit easier to understand. Personally, I like the original version more.
The Two Ravens
As I was walking all alone,
I heard two ravens making a moan;
One said to the other,
"Where shall we go and dine today?"
"In behind that old turf wall,
I sense there lies a newly slain knight;
And nobody knows that he lies there,
But his hawk, his hound and his lady fair."
"His hound is to the hunting gone,
His hawk to fetch the wild-fowl home,
His lady's has taken another mate,
So we may make our dinner sweet."
"You will sit on his white neck-bone,
And I'll peck out his pretty blue eyes;
With one lock of his golden hair
We'll thatch our nest when it grows bare."
"Many a one for him is moaning,
But nobody will know where he is gone;
Over his white bones, when they are bare,
The wind will blow for evermore."