That's An Irish Lullaby dung by John Gary, a brilliant voice.

Over in Killarney,
Many years ago,
Me mither sang a song to me
In tones so sweet and low.
Just a simple little ditty,
In her good ould Irish way,
And I'd give the world if she could sing
That song to me this day.

Too-ra-loo-ra-loo-ral,
Too-ra-loo-ra-li,
Too-ra-loo-ra-loo-ral,
Hush, now don't you cry!
Too-ra-loo-ra-loo-ral,
Too-ra-loo-ra-li,
Too-ra-loo-ra-loo-ral,
That's an Irish lullaby.

Oft, in dreams I wander
To that cot again,
I feel her arms a huggin' me
As when she held me then.
And I hear her voice a humin'
To me as in days or yore,
When she used to rock me fast asleep
Outside the cabin door.

Too-ra-loo-ra-loo-ral,
Too-ra-loo-ra-li,
Too-ra-loo-ra-loo-ral,
Hush, now don't you cry!
Too-ra-loo-ra-loo-ral,
Too-ra-loo-ra-li,
Too-ra-loo-ra-loo-ral,
That's an Irish lullaby (less info)