Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Karma Yoga Chapter 3, Verse 3.12.
Sanskrit
इष्टान्भोगान्हि वो देवा दास्यन्ते यज्ञभाविताः । तैर्दत्तानप्रदायैभ्यो यो भुङ्क्ते स्तेन एव सः ॥ ३.१…
Hindi
यज्ञके द्वारा बढ़ाये हुए देवता तुमलोगोंको बिना माँगे ही इच्छित भोग निश्चय ही देते रहेंगे । इस प्रकार उन देवताओंके द्वारा दिये हुए भोगोंको जो पुरुष उनको बिना दिये स्वयं भोगता है, वह चोर ही है|
English
Through the spirit of sacrifice of Yagya, the Deities grow and progress. As they grow, they will provide you with all the pleasures you desire. You should offer part of these pleasures to the Deities.If one is granted pleasures by another person, the one who receives the pleasures should share some of those pleasures with the provider of those pleasures, or else he is as bad as a thief.