Message 112774 on this thread, post dated 9 September 1999, gives the lyrics through Martin Ryan/Philippa/Áine. It can be confirmed that these lyrics duplicate exactly what is published in:

An Claisceadal copyright 1930
editor: Colm Ó Lochlainn

This collection, which gives the melody line and the Gaelic lyrics, can be accessed for free, online, at www.itma.ie in their archives; you can download a PDF file.

When you see the tune written out, it becomes clear that

"Lúibín Ó Lúth, bí Lúth a's bí Láidir"

is repeated twice in every iteration/verse.
One single line of text is sandwiched between the two iterations of the chorus/title.

Thus, while Áine's message format appears to show five verses of three different lines each, this is misleading in appearance.

There are actually sixteen separate lines of verse; each is sung, one at a time, between the two iterations of the chorus/title.