If we talk about mythological friendship there are two friendship stories which set the examples. The iconic friendship of Lord Krishna with Sudhama and friendship bond shared by Duryodhana with Karna teach the meaning of true friendship.
Krishna and Sudama were the best of friends despite a huge social and economic gap that divided the society. Sudama was struggling with poverty. He could have asked anything from his friend Krishna and could have transformed from rag to rich but he never made the demand for anything.
Once poor Sudama travelled all the way to Dwarka to meet his friend. He gifted some rice to Krishna and the king Krishna not only ate it but also called it the sweetest meal he ever had. When Sudama returned to his home his small cottage was replaced by a beautiful palace and everything changed completely by Lord Krishna.
10 teachings by the most renowned Scholars of the world
Karna was the first son of Kunti but she decided to abandon him due to her fear of the social stigma connected with a virgin girl giving birth to a child. When there was nobody with Karna, Duryodhana accepted him, made him the king of Anga. In the war with Pandavs, Karn fought for Duryodhana even after knowing that he will have to face his real brothers, the Pandavas. He knew that Duryodhana was wrong but since he helped him, he did not complain and fought in the battle and gave his life for friendship.
The 3 Guru-Shishya relationships to inspire you
On one hand, the friendship of Krishna and Sudama teach us that true friendship demands nothing and on the other, the friendship of Karna and Duryodhana shows that no matter what the situation is, a true friend never complains about anything and helps whenever needed.
The bottom line is that whether a friendship is like the one between Sudama and Krishna or Karna and Duryodhana, the things which drive a friendship are trust, love and affection for each other regardless of circumstances.