CORRECTION: change "uibhir" to "uachdair". I copied the lyrics as given at http://www.celticartscenter.com/Songs/Scottish/Buain_AChoirce.html, but "air uachdair", at the top makes more sense.

here are the relevant verses with "air uachdair" substituted for "air uimhir"

[ 3 ]
Gheàrr mi mo ghlùn is leig mi osna
Shuidh mi air uachdair a'ghoirtein

[Seist]

[ 4 ]
Shuidh mi air uachdair a'ghoirtein
Dh'fheuch am faicinn fear do choltais