rack one`s brains
to try hard to think of something or remember something
I have been racking my brains all day trying to remember the man's name.
Avataars of Lord Vishnu
Nara Narayana Avatar
Lord Vishnu took his fifth incarnation as sage Nara Narayan by taking a birth from the womb of a woman named Kala . He performed a tremendous penance by going to Badri and Kedar. He showed the importance Penance (Labour), and also that nothing can be achieved in this world without it.