Líth gacha labartha leat.

Líth gacha labartha leat.

(luck * of every * utterance * with you)

May your words prosper you!

Spoken by Conall in "Cath Muigi Rath" (p. 160 in FDG). He continues "caínleas cacha comairli chugud" (the fair benefit of every counsel to you = and may you benefit from every good counsel).