Mahabharata 1.2.66

ततोऽश्वमेधिकं पर्व सर्वपापप्रणाशनम्अनुगीता ततः पर्व ज्ञेयमध्यात्मवाचकम्

tato'śvamedhikaṃ parva sarvapāpapraṇāśanamanugītā tataḥ parva jñeyamadhyātmavācakam

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