Bhagavad Gita · 3.11

देवान्भावयतानेन ते देवा भावयन्तु वः।परस्परं भावयन्तः श्रेयः परमवाप्स्यथ॥

devān bhāvayatānena te devā bhāvayantu vaḥ parasparaṁ bhāvayantaḥ śhreyaḥ param avāpsyatha

By sacrifice nourish the celestial beings, and may they nourish you in return. By mutually nourishing one another, you shall attain the highest good.

— Bhagavad Gita 3.11

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