Majjhima Nikaya 5:255
SUJATOIdha, bhikkhave, bhikkhuno asmimāno pahīno hoti, ucchinnamūlo tālāvatthukato anabhāvaṅkato, āyatiṁ anuppādadhammo.
It’s when a mendicant has given up the conceit ‘I am’, cut it off at the root, made it like a palm stump, obliterated it, so it’s unable to arise in the future.