CHĀNDOGYA UPANISHAD · 6.11.1

अस्य सोम्य महतो वृक्षस्य यो मूले ऽभ्याहन्याज् जीवन् स्रवेद् यो मध्ये ऽभ्याहन्याज् जीवन् स्रवेद् यो ऽग्रे ऽभ्याहन्याज् जीवन् स्रवेत् ।
स एष जीवेनात्मनानुप्रभूतः पेपीयमानो मोदमानस् तिष्ठति ॥

asya somya mahato vṛkṣasya yo mūle ’bhyāhanyāj jīvan sraved yo madhye ’bhyāhanyāj jīvan sraved yo ’gre ’bhyāhanyāj jīvan sravet ।
sa eṣa jīvenātmanānuprabhūtaḥ pepīyamāno modamānas tiṣṭhati ॥

'If some one were to strike at the root of this large tree here, it would bleed, but live. If he were to strike at its stem, it would bleed, but live. If he were to strike at its top, it would bleed, but live. Pervaded by the living Self that tree stands firm, drinking in its nourishment and rejoicing;

F. Max Müller · The Upanishads, Sacred Books of the East 1 (1879)