Yoga Sūtra Chapter Three verse 15

क्रमान्यत्वं परिणामान्यतेवे हेतुः ॥१५॥

krama-anyatvaṃ pariṇāma-anyatve hetuḥ ||15||

Another sequence is the cause of another transformation.

krama - sequence; order; series; regular arrangement; succession; progressing step by step; in regular course; gradually, by degreesanyatva - anotherpariṇāma - transformationhetu - cause, cause of; motive; reason for