Bhagavad Gita 12.10 Chapter 12, Verse 10

अभ्यासेऽप्यसमर्थोऽसि मत्कर्मपरमो भव ।
मदर्थमपि कर्माणि कुर्वन् सिद्धिमवाप्स्यसि ॥१२.१०॥

abhyāse'pyasamartho'si matkarmaparamo bhava
madarthamapi karmāṇi kurvan siddhimavāpsyasi

Meaning

If you are unable even to practise, devote yourself to working for me. Even by doing actions for my sake you will attain perfection.

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 12.10 (Chapter 12, The Yoga of Devotion (Bhakti Yoga), Verse 10)