Patanjali's yoga sutras

ततो द्वन्द्वानभिघातः ॥ २.४८ ॥

tato dvandvānabhighātaḥ || 2.48 ||

tataḥ—then. dvandva—from the pairs of opposite; A strife, contention, quarrel, dispute, fight.. anabhighātaḥ—cessation of disturbance.

Then, you cease to be disturbed, even by conflict.