Majjhima Nikaya 2:117
SUJATOSantaṁ vā ajjhattaṁ byāpādaṁ ‘atthi me ajjhattaṁ byāpādo’ti pajānāti, asantaṁ vā ajjhattaṁ byāpādaṁ ‘natthi me ajjhattaṁ byāpādo’ti pajānāti; yathā ca anuppannassa byāpādassa uppādo hoti tañca pajānāti, yathā ca uppannassa byāpādassa pahānaṁ hoti tañca pajānāti, yathā ca pahīnassa byāpādassa āyatiṁ anuppādo hoti tañca pajānāti.
When they have ill will in them, they understand: ‘I have ill will in me.’ When they don’t have ill will in them, they understand: ‘I don’t have ill will in me.’ They understand how ill will arises; how, when it’s already arisen, it’s given up; and how, once it’s given up, it doesn’t arise again in the future.