Mahabharata 6.103.74

इमं च शृणु मे पार्थ संकल्पं पूर्वचिन्तितम्अमङ्गल्यध्वजं दृष्ट्वा न युध्येयं कथंचन

imaṃ ca śṛṇu me pārtha saṃkalpaṃ pūrvacintitamamaṅgalyadhvajaṃ dṛṣṭvā na yudhyeyaṃ kathaṃcana

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