मन्यसे यच्च कौन्तेयमर्जुनं श्रान्तमाहवे
manyase yac ca kaunteyam arjunaṁ śrāntam āhave
सञ्जय उवाच—यदि मन्यसे, कौन्तेयमर्जुनं श्रान्तमाहवे…
संजय उवाच
The line frames a moral-psychological point central to epic warfare: do not underestimate a dharmic warrior’s resolve by assuming fatigue implies defeat; endurance and duty can outlast physical strain.
Sañjaya, narrating the battlefield events to Dhṛtarāṣṭra, begins a conditional statement addressing an assumption that Arjuna has become tired in combat, setting up a rebuttal or further description of Arjuna’s continuing prowess.