Chapter 12 · The Yoga of Devotion · Krishna said
Bhagavad Gita 12.10 — Work done for God
अभ्यासेऽप्यसमर्थोऽसि मत्कर्मपरमो भव। मदर्थमपि कर्माणि कुर्वन्सिद्धिमवाप्स्यसि ॥
abhyāse'pyasamartho'si matkarmaparamo bhava | madarthamapi karmāṇi kurvansiddhimavāpsyasi ||
Meaning
If you cannot even practise, then make working for me your highest aim. Even by doing actions for my sake, you will reach perfection.