Bhagavad Gita 6.45

Then, after many lives of earnest striving and absolution of sins, the student of spirituality attains perfection and reaches the Supreme.

प्रयत्नाद्यतमानस्तु योगी संशुद्धकिल्बिषः।
अनेकजन्मसंसिद्धस्ततो याति परां गतिम्॥

prayatnādyatamānastu yogī saṃśuddhakilbiṣaḥ|
anekajanmasaṃsiddhastato yāti parāṃ gatim||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).