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.
Book of Obadiah
The date of composition is disputed and is difficult to determine due to the lack of personal information about Obadiah, his family, and his historical milieu. The date of composition must therefore be determined based on the prophecy itself. Edom is to be destroyed due to its lack of defense for its brother nation, Israel, when it was under attack. There are two major historical contexts within which the Edomites could have committed such an act. These are during 853 – 841 BC when Jerusalem was invaded by Philistines and Arabs during the reign of Jehoram of Judah (recorded in 2 Kings 8:20–22 and 2 Chronicles 21:8–20 in the Christian Old Testament) and 607 – 586 BC when Jerusalem was attacked by Nebuchadrezzar II of Babylon, which led to the Babylonian exile of Israel (recorded in Psalm 137). The earlier period would place Obadiah as a contemporary of the prophet Elijah as reflected in 1 Kings 18:1-16. In particular, 1 Kings 18:7-8 reads: "As Obadiah was walking along, Elijah met him. Obadiah recognized him, bowed down to the ground, and said, 'Is it really you, my lord Elijah?' 'Yes,' he replied. 'Go tell your master, "Elijah is here."'" (NIV)