Wajas Shravasya is a top donor. Literally the name means one who is famous for donating material possessions, precisely rice or food. The son of Waj as Shrava is Wajas Shrava and he performed ritual. There are many kinds of rituals meant to give you some results. You can use spend it and you can, you can't have a choice exactly that you can't share your good karma.
Swami Sarvapriyananda teaches the Katha Upanishad, which is one of the most popular Upanishads. The scripture concerns the story of a young man who goes to the house of death to find out what happens after death. The reply describes the nature of reality and the meaning of life.