SB 1.18.28 TRANSLATION
The King, not received by any formal welcome by means of being offered a seat, place, water and sweet addresses, considered himself neglected, and so thinking he became angry.
The law of reception in the codes of the Vedic principles states that even if an enemy is received at home, he must be received with all respects. He should not be given a chance to understand that he has come into the house of an enemy. When Lord Krsna, accompanied by Arjuna and Bhima, approached Jaräsandha in Magadha, the respectable enemies were given a royal reception by King Jaräsandha. The guest enemy, namely Bhima, was to fight with Jaräsandha, and yet they were given a grand reception. At night they used to sit down together as friends and guests, and in the day they used to fight, risking life and death. That was the law of reception.