Bhagavad Gita 9.27
यत्क्रोषि यदश्नासि यज्जुहोषि ददासि यत् |
यत्तपस्यसि कौन्तेय तत्कुरुष्व मदारनम्
Translation
Whatever you do, whatever you eat, whatever you offer as oblation to the sacred fire, whatever you bestow as a gift, and whatever austerities you perform, O son of Kunti, do them as an offering to Me.