This seems to be a different song but very interesting!
The Lairin O Lurtha I referred to is a book that seems to be a collection of songs.
The song I have heard is a weaving song in the style of a Lúibín and originates in Munster.
I will transcribe the words I have that are from the original song when I am home, and the few words that I can understand from the original song.
Thanks for all the responses...it is great to hear all the knowledge you all have!