Mahabharata 1.222.15

वयमप्यग्निमाविश्य लोकान्प्राप्स्यामहे शुभान्अथास्मान्न दहेदग्निरायास्त्वं पुनरेव नः

vayamapyagnimāviśya lokānprāpsyāmahe śubhānathāsmānna dahedagnirāyāstvaṃ punareva naḥ

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