Shiva Purana
वृक्षस्य मूलसेकेन शाखाः पुष्यंति वै यथा ॥ शिवस्य पूजया तद्वत्पुष्यत्यस्य वपुर्जगत् ॥ २९ ॥
Just as the branches are nourished by watering the roots of the tree, so also by the worship of Śiva his body, the universe, is nourished.
english translation
vRkSasya mUlasekena zAkhAH puSyaMti vai yathA ॥ zivasya pUjayA tadvatpuSyatyasya vapurjagat ॥ 29 ॥
hk transliteration by Sanscript