Mahabharata 3.135.25

तं तथा तप्यमानं तु तपस्तीव्रं महामुनिम्उपेत्य बलभिद्देवो वारयामास वै पुनः

taṃ tathā tapyamānaṃ tu tapastīvraṃ mahāmunimupetya balabhiddevo vārayāmāsa vai punaḥ

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