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.
Abigail
Abigail and David's second wife, Ahinoam the Jezreelite, accompany David and his war band as they seek refuge in Philistine territory. While David and his men are encamped near Jezreel, they are captured by Amalekites who raided the town of Ziglak and carried off the women and children. David led the pursuit, and they were subsequently rescued. Both wives then settle with David in Hebron, where Abigail gives birth to David's second son, Chileab (also called Daniel).