तमुवाच हृषीकेशः प्रहसन्निव भारत।
सेनयोरुभयोर्मध्ये विषीदन्तमिदं वचः।।2.10।।
।।2.10।। हे भारत (धृतराष्ट्र) दोनों सेनाओं के बीच में उस शोकमग्न अर्जुन को भगवान् हृषीकेश ने हँसते हुए से यह वचन कहे।।
In this way although Arjuna had decided to refrain from the battle still Dhritarastra should not expect that the future of his sons was to be bright and happy as long as the Supreme Lord Krishna, the controller of the animate and inanimate who descended personally to destroy the miscreants is present in this world. To emphasize this reality Sanjaya said to him O Bharata referring to his anscestor, the great monarch of all the world King Bharata telling frankly that the joy he is feeling regarding Arjunas seemingly abstention from the battle and the termination of the war was not appropriate. Lord Krishna with a subtle smile upon his face then spoke to Arjuna who was lamenting at a most inappropriate time between the 2 opposing armies. The word prahasan meaning smiling is used to subtlely indicate sarcasam and evoke anger at the impropriety of such limpid sensitivity by Arjuna who in his own right is a mighty warrior respected and reknowed by all the mightiest warriors of his time. This smile indicating sarcasm is justified by the use of the word iva as it were indicating that due to the nature of the situation, being the 2 armies immeadiately ready for battle, Arjunas reluctancy and Lord Krishna accepting him as a disciple. So in order to substantiate Arjunas fitness to receive spiritual knowledge this subtle smile is used to remove any lingering vestiges of pride Arjuna might have had regarding his knowledge, intelligence and prowess.
