तमुवाच हृषीकेशः प्रहसन्निव भारत ।
सेनयोरुभयोर्मध्ये विषीदन्तमिदं वचः ।।
tamuvāca hṛṣīkeśaḥ prahasanniva bhārata ।
senayorubhayormadhye viṣīdantamidaṃ vacaḥ ।।
Oh bharata-clan born dhritarashtra, Lord of Indriyas (Krishna) spoke unto Arjuna (who was standing in between the 2 armies refusing to fight) with a mocking & charming smile
He knew that the time has come for gitOpadesa, whereby countless jIvAtmas are going to benefit from it. Rahasyas that are deeply buried & hard to explain, understand, follow & practice are now going to be given on platter!!
Hence the above said interpretation