Mahabharata 12.59.112

प्रतिज्ञां चाधिरोहस्व मनसा कर्मणा गिरापालयिष्याम्यहं भौमं ब्रह्म इत्येव चासकृत्

pratijñāṃ cādhirohasva manasā karmaṇā girāpālayiṣyāmyahaṃ bhaumaṃ brahma ityeva cāsakṛt

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