पणितस्तस्यापकारसमर्थो विक्रमेत अन्यथा संदध्यात् ॥ कZ_०७.७.१२ ॥
paṇitas tasyāpakārasamartho vikrameta anyathā saṃdadhyāt
When bargaining, if one is capable of harming (retaliating against) him, one should press forward; otherwise, one should make a settlement.
Whether you possess credible capacity to impose costs on the counterpart (apakāra-sāmarthya).