* The shanti mantras
Aum sahanaavavatu
Sahanau bhunaktu
Saha viiryan karavaavahai
Tejasvi naavadhiitamastu
Maa vidvishhaavahai

Meaning:
May we be protected together.
May we be nourished together.
May we work together with great vigor.
May our study be enlightening
May no obstacle arise between us.
[krishna] Yajurveda Taittiriya Upanishad 2.2.2

* Universal prayer
सर्वेषां स्वस्ति भवतु । सर्वेषां शान्तिर्भवतु ।
सर्वेषां पूर्नं भवतु । सर्वेषां मड्गलं भवतु ॥
Sarveśām Svastir Bhavatu
Sarveśām Sāntir Bhavatu
Sarveśām Pūrnam Bhavatu
Sarveśām Mangalam Bhavatu

Meaning:
May good befall all, May there be peace for all, May all be fit for perfection, and May all experience that which is auspicious.