Goliath
Goliath is described in the biblical Book of Samuel as a Philistine giant defeated by the young David in single combat. The story signified Saul's unfitness to rule, as Saul himself should have fought for the Kingdom of Israel.
Daniel in the lions' den
It is generally accepted that the Book of Daniel originated as a collection of folktales among the Babylonian diaspora, the Jewish community living in Babylon and Mesopotamia in the Persian and Hellenistic periods (5th to 2nd centuries BC). Chapters 4–6, which includes the tale of Daniel in the lions' den, may belong to the earliest stage, as these differ quite markedly in the oldest texts. Although the entire book is traditionally ascribed to Daniel the seer, the tales of chapters 1-6, including the story of the lion's den, are the voice of an anonymous narrator (except for chapter 4 which is in the form of a letter from king Nebuchadnezzar). It is possible that the name of Daniel was chosen for the hero because of his reputation as a wise seer in Hebrew tradition.