KENA UPANISHAD · 3/3

तेऽग्निमब्रुवन्जातवेद एतद्विजानीहि किमेतद्यक्षमिति तथेति ॥

te’gnimabruvanjātaveda etadvijānīhi kimetadyakṣamiti tatheti ॥

They said to Agni, 'O thou that knowest all things born, learn of this thing, what may be this mighty Daemon,' and he said, 'So be it.'

Sri Aurobindo · CWSA 18, p. 8