Mahabharata 14.83.27

तमर्जुनः समाश्वास्य पुनरेवेदमब्रवीत्आगन्तव्यं परां चैत्रीमश्वमेधे नृपस्य नः

tamarjunaḥ samāśvāsya punarevedamabravītāgantavyaṃ parāṃ caitrīmaśvamedhe nṛpasya naḥ

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