Bhagavad Gita · 9.27

यत्करोषि यदश्नासि यज्जुहोषि ददासि यत्।यत्तपस्यसि कौन्तेय तत्कुरुष्व मदर्पणम्॥

yat karoṣhi yad aśhnāsi yaj juhoṣhi dadāsi yat yat tapasyasi kaunteya tat kuruṣhva mad-arpaṇam

Whatever you do, whatever you eat, whatever you offer in sacrifice, whatever you give, whatever austerity you perform, O son of Kunti — do that as an offering to Me.

— Bhagavad Gita 9.27

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)