Mahabharata 13.36.2

शक्रो ह्यज्ञातरूपेण जटी भूत्वा रजोरुणःविरूपं रूपमास्थाय प्रश्नं पप्रच्छ शम्बरम्

śakro hyajñātarūpeṇa jaṭī bhūtvā rajoruṇaḥvirūpaṃ rūpamāsthāya praśnaṃ papraccha śambaram

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