Brihadaranyaka Upanishad 2.5.2

2.5.2

imā āpaḥ sarveṣāṃ bhūtānāṃ madhvāsāmapām̐ sarvāṇi bhūtāni madhu yaścāyamāsvapsu tejomayo'mṛtamayaḥ puruṣo yaścāyamadhyātmam̐ raitasastejomayo'mṛtamayaḥpuruṣo'yameva sa yo'yamātmedamamṛtamidaṃ brahmedam̐ sarvam

This water is the honey of all beings, and all beings are the honey of this water. Likewise this bright, immortal person in this water, and that bright, immortal person, existing as seed in the body (both are madhu). He indeed is the same as that Self, that Immortal, that Brahman, that All.