BṚHADĀRAṆYAKA UPANISHAD · 6.3.7

तं हैतम् उद्दालक आरुणिर् वाजसनेयाय याज्ञवल्क्यायान्तेवासिन उक्त्वोवाच -- अपि य एनं शुष्के स्थाणौ निषिञ्चेज् जायेरञ् छाखाः प्ररोहेयुः पलाशानीति ॥

taṃ haitam uddālaka āruṇir vājasaneyāya yājñavalkyāyāntevāsina uktvovāca -- api ya enaṃ śuṣke sthāṇau niṣiñcej jāyerañ chākhāḥ praroheyuḥ palāśānīti ॥

Uddâlaka Âruni told this (Mantha-doctrine) to his pupil Vâgasaneya Yâgñavalkya, and said: 'If a man were to pour it on a dry stick, branches would grow, and leaves spring forth.'

F. Max Müller · The Upanishads, Sacred Books of the East 15 (1884)