TAITTIRĪYA UPANISHAD · 3.6

आनन्दो ब्रह्मेति व्यजानात् । आनन्दाद्ध्येव खल्विमानि
भूतानि जायन्ते । आनन्देन जातानि जीवन्ति ।
आनन्दं प्रयन्त्यभिसंविशन्तीति ।
सैषा भार्गवी वारुणी विद्या । परमे व्योमन्प्रतिष्ठिता ।
स य एवं वेद प्रतितिष्ठति । अन्नवानन्नादो भवति ।
महान्भवति प्रजया पशुभिर्ब्रह्मवर्चसेन ।
महान् कीर्त्या ।

ānando brahmeti vyajānāt । ānandāddhyeva khalvimāni
bhūtāni jāyante । ānandena jātāni jīvanti ।
ānandaṃ prayantyabhisaṃviśantīti ।
saiṣā bhārgavī vāruṇī vidyā । parame vyomanpratiṣṭhitā ।
sa ya evaṃ veda pratitiṣṭhati । annavānannādo bhavati ।
mahānbhavati prajayā paśubhirbrahmavarcasena ।
mahān kīrtyā ।

He knew Bliss for the Eternal. For from Bliss alone, it appeareth, are these creatures born and being born they live by Bliss and to Bliss they go hence and return. This is the lore of Bhrigu, the lore of Varouna, which hath its firm base in the highest heaven. Who knoweth, getteth his firm base, he becometh the master of food and its eater, great in progeny, great in cattle, great in the splendour of holiness, great in glory.

Sri Aurobindo · CWSA 18, pp. 227, 228