PRAŚNA UPANISHAD · 6.5

स यथेमा नद्यः स्यन्दमानाः समुद्रायणाः समुद्रं प्राप्यास्तं
गच्छन्ति भिद्येते तासां नामरूपे समुद्र इत्येवं प्रोच्यते । एवमेवास्य
परिद्रष्टुरिमाः षोडशकलाः पुरुषायणाः पुरुषं प्राप्यास्तं गच्छन्ति
भिद्येते चासां नामरूपे पुरुष इत्येवं प्रोच्यते स एषोऽकलोऽमृतो
भवति तदेष श्लोकः ॥ ६.५॥

sa yathemā nadyaḥ syandamānāḥ samudrāyaṇāḥ samudraṃ prāpyāstaṃ
gacchanti bhidyete tāsāṃ nāmarūpe samudra ityevaṃ procyate । evamevāsya
paridraṣṭurimāḥ ṣoḍaśakalāḥ puruṣāyaṇāḥ puruṣaṃ prāpyāstaṃ gacchanti
bhidyete cāsāṃ nāmarūpe puruṣa ityevaṃ procyate sa eṣo’kalo’mṛto
bhavati tadeṣa ślokaḥ ॥ 6.5॥

“Therefore as all these flowing rivers move towards the sea, but when they reach the sea they are lost in it and name and form break away from them and all is called only the sea, so all the sixteen members of the silent witnessing Spirit move towards the Being, and when they have attained the Being they are lost in Him and name and form break away from them and all is called only the Being; then is He without members and immortal. Whereof this is the Scripture.

Sri Aurobindo · CWSA 18, p. 191