Dhammapada Verse 20.6

Sanskrit Verse

सर्वे संस्कारा दुःखा इति यदा प्रज्ञया पश्यति । अथ निर्विन्दति दुःखानि एष मार्गो विशुद्धये ॥

Bhikkhu Ānandajoti's translation

All conditions are suffering, when one sees this with wisdom, then one grows tired of suffering – this is the path to purity.