Chapter 3 · verse 12 · gita.yoga.org

Bhagavad Gita 3.12

इष्टान्भोगान्हि वो देवा दास्यन्ते यज्ञभाविताः। तैर्दत्तानप्रदायैभ्यो यो भुङ्क्ते स्तेन एव सः

The gods, nourished by the sacrifice, will give you the desired objects. So, he who enjoys the objects given by the gods without offering anything in return is indeed a thief.