Shloka 15
द्रौणिश्वुकोप पार्थाय कृष्णाय च विशेषतः । स तु यत्तो रथे स्थित्वा वार्युपस्पृश्य वीर्यवान्
drauṇiśv-ukopa pārthāya kṛṣṇāya ca viśeṣataḥ | sa tu yatto rathe sthitvā vāry upaspṛśya vīryavān ||
サञ्जयは語った。ドローナの子アシュヴァッターマンは、パールタ（アルジュナ）に対して、そしてとりわけクリシュナに対して怒りを燃え上がらせた。だがその剛勇の士は自らを抑え、戦車の上に立ったまま、水に触れる儀礼を行った—行動に先立つ沈着な備えである。
संजय उवाच
Educational Q&A
Even amid battlefield fury, a warrior is expected to maintain self-control and act with deliberation; the gesture of touching water (upaspṛśya) signals composed readiness and adherence to customary discipline rather than impulsive violence.
Sañjaya reports that Aśvatthāman becomes angry at Arjuna and especially at Kṛṣṇa, but he restrains himself, stands on his chariot, and performs a brief water-touching rite (ācamana-like purification) as he prepares for the next action in the fight.