Mahabharata 14.44.15

आदिर्विश्वस्य जगतो विष्णुर्ब्रह्ममयो महान्भूतं परतरं तस्मात्त्रैलोक्ये नेह विद्यते

ādirviśvasya jagato viṣṇurbrahmamayo mahānbhūtaṃ parataraṃ tasmāttrailokye neha vidyate

Our plain-language meaning of this verse is waiting for scholar review.