As the preparations for the war were being made, both the Kauravas and the Pandavas were trying to get the support of more and more kings from far and wide.
Duryodhana went to Krishna, the king of Dwarka, to ask for his support. He reached Krishna's palace, but at that time Krishna was taking a nap. So Duryodhana went and took a seat beside his head and waited for him to wake up. At the same time, Arjuna also came to Krishna to ask him to support the Pandavas in the war. Arjuna was very humble and sat near Krishna's feet.
When Krishna woke up, he saw Arjuna first because Duryodhana was sitting behind him. Duryodhana said, I have come to ask for your support in the war." Arjuna also made the same request. Duryodhana said, "I came before Arjuna, so you should help me and not him." Krishna said, "Due to your pride you sat beside my head so I saw Arjuna first. But you are both dear to me so I will help you both dear to me so I will help you both. To one of you I will give my army (Narayani Sena) and to the other I will give my moral support because I will not fight in the war. Arjuna is younger so I will ask him to choose."
Arjuna , without wasting a second, chose Krishna's moral support . He knew that with his support and guidance, the Pandavas would certainly win the war.
When Duryodhana heard Arjuna's choice, he was very happy. He was foolish enough to think that Krishna, who wouldn't even fight in the war, would be of no use to him; Krishna's huge army would certainly be of help.