I didn't find that one, but here is another (Seanfhocail na Mumhan #2301)
Na trí súile is géire:
Súil na circe i ndiaidh an ghráinne,
Súil an ghabha i ndiaidh an tairne,
Agus súil ainnire i ndiaidh a grá ghíl.
The three sharpest eyes:
Eye of hen on grain,
Eye of smith on nail,
Eye of belle on her beloved.
Here is one in Old Irish from Dennis' site:
http://www.sengoidelc.com/node/235