O Baoill, Ceolta Gael 2 uses the short title "Cill Mhuire"

you can also listen at http://www.cdbaby.com/cd/debarra track 7

http://www.cdbaby.com/cd/chrismaire track 12 - clip only (Máire Ní Chathasaigh & Chris Newman)

sample clip (or purchase download) of https://www.amazon.co.uk/Cnoc%C3%A1in%C3%ADn-Aerach-Chill-Mhuire/dp/B003IAMUM0 of Cnocáinín Aerach Chill Mhuire performed by
Tomás Ó Súilleabháin & Seán Ó Riada From the Album Ceolta Éireann (Songs & Airs of Ireland (you probably have to look up a link for whatever country you are in.)

young Shona White singshttp://www.rusheenns.ie/wordpress/?p=1347

De Barra and Máire Ní Chathasaigh both sing Cill Mhuire faster than I've heard it sung live - or than Tomás O Súilleabháin or Séamus O Beaglaíoch or Shona White sings it. I prefer the Séamus O Beaglaíoch and Tim Edey recording (two links in previous threads, or look it up on youtube).

Maybe someone with Irish and with better ears and sound system than I have can pick out all the words of the chorus. If you can find a (library)copy of Pádraic Breathnach Ceol ár Sinséar, 1923, maybe the lyrics there include chorus.