BṚHADĀRAṆYAKA UPANISHAD · 6.3.8

एतम् उ हैव वाजसनेयो याज्नवल्क्यो मधुकाय पैङ्ग्यायान्तेवासिन उक्त्वोवाच -- अपि य एनं शुष्के स्थाणौ निषिञ्चेज् जायेरञ् छाखाः प्ररोहेयुः पलाशानीति ॥

etam u haiva vājasaneyo yājnavalkyo madhukāya paiṅgyāyāntevāsina uktvovāca -- api ya enaṃ śuṣke sthāṇau niṣiñcej jāyerañ chākhāḥ praroheyuḥ palāśānīti ॥

Vâgasaneya Yâgñavalkya told the same to his pupil Madhuka Paiṅgya, and said: 'If a man were to pour it on a dry stick, branches would grow, and leaves spring forth.'