Bhagavad Gita 13.23
Thus, in the body of man dwells the Supreme God; He who sees, permits, upholds, and enjoys is the Highest God and the Highest Self.
उपद्रष्टाऽनुमन्ता च भर्ता भोक्ता महेश्वरः।परमात्मेति चाप्युक्तो देहेऽस्मिन्पुरुषः परः॥upadraṣṭā'numantā ca bhartā bhoktā maheśvaraḥ|paramātmeti cāpyukto dehe'sminpuruṣaḥ paraḥ||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).