see Bise Mo Shuil The link at that thread to the old Irish works, but unfortunately, the first of the three lyrics links I give there is no longer available (not today anyway). I'll try to find the words and type them up, but it may be some time. Begins:
Bí-se i mo shúil, a Rí mhór na ndúil.
Líon thusa mo bheatha, mo cheadfaí 's mo stuaim.
Bí thusa i m'aigne gach oíches 's gach lá
Im chodladh no im dhuiseacht [?]...