Mahagovindasutta 46.8

46.8

Idhekacco karuṇāsahagatena cetasā ekaṃ disaṃ pharitvā viharati, tathā dutiyaṃ, tathā tatiyaṃ, tathā catutthaṃ. Iti uddhamadhotiriyaṃ sabbadhi sabbattatāya sabbāvantaṃ lokaṃ karuṇāsahagatena cetasā vipulena mahaggatena appamāṇena averena abyāpajjena pharitvā viharati.

It’s when someone meditates spreading a heart full of compassion to one direction, and to the second, and to the third, and to the fourth. In the same way above, below, across, everywhere, all around, they spread a heart full of compassion to the whole world—abundant, expansive, limitless, free of enmity and ill will.