We do this chant at the end of the Satsang meditation period. It’s an ancient mantra beloved in both the Buddhist and Hindu Yoga traditions, and translates roughly as:
May all beings be at ease.
OM, Peace, peace, peace.
If you want to use it as a mantra to repeat, you could omit the “oṃ śāntiḥ” part and just let the first line turn through your heart-mind in a gentle rhythm. You can use it as a meditation mantra linking it to the breath, thinking “lokāḥ samastāḥ” on the in-breath, and “sukhino bhavantu” on the out. And you can chant it as a beautiful prayer, saturating the heart and mind with the wish for all beings to be safe and at ease. The ancient Buddhist texts tell us to radiate this quality of friendliness and love out in all directions, impartially, to everyone everywhere. It’s one of the most beautiful and transformative practices we have. May all beings be at ease.