Name #8 of 1000 · Viṣṇu Sahasranāma
भूतात्माbhūtātmā
Bhutatma
The soul within every being
From shloka 1 · chapter Matsya
ॐ विश्वं विष्णुर्वषट्कारो भूतभव्यभवत्प्रभुः ।
भूतकृद्भूतभृद्भावो भूतात्मा भूतभावनः ॥
oṃ viśvaṃ viṣṇurvaṣaṭkāro bhūtabhavyabhavatprabhuḥ
bhūtakṛdbhūtabhṛdbhāvo bhūtātmā bhūtabhāvanaḥ
Also in this shloka: viśvam · viṣṇuḥ · vaṣaṭkāraḥ · bhūtabhavyabhavatprabhuḥ · bhūtakṛt · bhūtabhṛt · bhāvaḥ · bhūtabhāvanaḥ