Iti 19
Itivuttaka: The Group of Ones
translated from the Pali by
Thanissaro Bhikkhu
This was said by the Blessed One, said by the Arahant, so I have heard: "One thing, when arising in the world, arises for the welfare of many, for the happiness of many, for the welfare & happiness of many beings, both human & divine. Which one thing? Concord in the Sangha. When the Sangha is in concord, there are no arguments with one another, no abuse of one another, no ganging up on one another, no abandoning of one another. Then those with little confidence [in the teaching] become confident, while those already confident become even more so."
Blissful is concord in the Sangha. One who assists in concord delighting in concord, judicious isn't barred from safety from bondage. Having brought concord to the Sangha, he rejoices for an aeon in heaven.