Devibhagavatapurana 11.16.6

Devībhāgavatapurāṇa 11.16.6

vipro vṛkṣo mūlakānyatra sandhyā vedaḥ śākhā dharmakarmāṇi patram |
tasmānmūlaṃ yatnato rakṣaṇīyaṃ chinne mūle naiva vṛkṣo na śākhā ||