I know a song called the Human Touch which has the Gaelic Blessing in it. Does anyone know a source for the song?

It's the human touch in this world that counts,
The touch of your hand in mine,
That means far more to the fainting heart
Than shelter, bread or wine.
The shelter is gone when the night is o'er,
The bread lasts only a day,
But the touch of your hand and the sound of your voice
Sing on in my heart always.

May the road rise up to meet you,
May the wind be always at your back.
May the sun shine soft upon your face,
The rain fall soft upon your fields.
And until we meet again, my friend,
May God hold you in the palm of His hand,
May the memories that we have shared linger on and on.