Yoga Sūtra Chapter Two verse 39

अपरिग्रहस्थैर्ये जन्मकथंता संबोधः ॥३९॥

aparigraha-sthairye janma-kathaṃtā-saṃbodhaḥ ||39||

When steadfastness in non-grasping understanding of the wherefore of birth.

aparigrahā - non-graspingsthairya - steadfastness, steadinessjanman - birthkathaṃtā - whereforesaṃbodha - understanding