Vishnuji asked his dawrpals, Jaya, Vijay what do they want- 7 births as his bhaktas or 3 births as his enemies. They prefered the later as they wanted to return to Vaikunth faster. They were Shishupal & Dantavakra killed by Shishupal.Originally posted by: girl25-shivafan
There were 2 guards (dwarpalaks/ gatekeepers) in vaikunth. once brahmaji's 4 children wanted to meet vishnu and they came to vaikunth. But these 2 dwarpalaks refused to allow them inside vaikunth and also insulted them very badly. So Brahmaji's 4 children got very angry and cursed these dwarpalaks - that they would be born as asurs (rakshasas) for 10 births. Then Lord Vishnu came running, taking pity on these 2 dwarpalaks and apologised to brahmaji's 4 children on their behalf. Finally these 4 children obliged to lord vishnu's words and were ready to forgive these 2 dwarpalaks. They said that these 2 dwarpalaks would get moksha at the hands of lord vishnu in each of the 10 births and finally they would be free from the curse after their 10th birth. This is the reason why lord vishnu had to take 10 avatars. These 2 dwarpalaks were born as hiranyakshan (killed by varaha avatar of vishnu) and hiranyakashipu (killed in narasimha avatar) , then ravan and kumbhakaran (killed by rama) , kamsan and jarasandan (killed by krishna), etc etc.