Family prints
Ná caith an t-uisce salach amach go mbeadh an t-uisce glan istigh
Keep what you have until the replacement is real.
For anyone about to quit the old job before the new one is signed.
The wording is quoted exactly from the record and its cited source; personalisation touches only your own names and date, never the Irish.
About this saying
This one comes not from a dictionary but from an Aran Islands copybook: a Schools’ Collection page from Fearann an Choirce on Inis Mór, written in the late 1930s, in a list of proverbs a schoolchild gathered at home. The wording is carried exactly as the transcript gives it.