Seven

Seven A mystic or sacred number. It is composed of four and three, which, among the Pythagoreans, were, and from time immemorial have been, accounted lucky numbers. Among the Babylonians, Egyptians, and other ancient peoples, there were seven sacred planets. The Hebrew verb for "to swear" means literally to come under the influence of seven things; There are seven days in Creation, seven days in the week, seven graces, seven deadly sins Benét's Reader's Encyclopedia (Siepmann, 1987) Cosmic.