ChU 6.11.2
अस्य यद् एकां शाखां जीवो जहात्य् अथ सा शुष्यति । द्वितीयां जहात्य् अथ सा शुष्यति । तृतीयां जहात्य् अथ सा शुष्यति । सर्वं जहाति सर्वः शुष्यति
asya yad ekāṃ śākhāṃ jīvo jahāty atha sā śuṣyati | dvitīyāṃ jahāty atha sā śuṣyati | tṛtīyāṃ jahāty atha sā śuṣyati | sarvaṃ jahāti sarvaḥ śuṣyati
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
'But if the life (the living Self) leaves one of its branches, that branch withers; if it leaves at second, that branch withers; if it leaves a third, that branch withers. If it leaves the whole tree, the whole tree withers. In exactly the same manner, my son, know this.' Thus he spoke:
Translated by F. Max Müller