Mahabharata 1.65.20

तप्यमानः किल पुरा विश्वामित्रो महत्तपःसुभृशं तापयामास शक्रं सुरगणेश्वरम्

tapyamānaḥ kila purā viśvāmitro mahattapaḥsubhṛśaṃ tāpayāmāsa śakraṃ suragaṇeśvaram

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