Om Puurnnam-Adah Puurnnam-Idam Puurnnaat-Purnnam-Udacyate Puurnnashya Puurnnam-Aadaaya Puurnnam-Eva-Avashissyate Om Shaantih Shaantih Shaantih
This is the Shanti mantra (invocatory verse) of Isha Upanishad (IshaVasya Upanishad) Which is a part of the (Shukla) Yajurveda
1: Om, That (Outer World) is Purna (Full with Divine Consciousness); This (Inner World) is also Purna (Full with Divine Consciousness); From Purna comes Purna (From the Fullness of Divine Consciousness the World is manifested) 2: Taking Purna from Purna, Purna Indeed Remains (Because Divine Consciousness is Non-Dual and Infinite). 3: Om Peace, Peace, Peace.