David and Goliath (2015)

Young David, a.k.a. Shepherd Boy, has more faith in God than anyone else among his people. If no one in Saul's army will take on Goliath - the champion man-slayer among Leader Jaggar's Philistines - he will. David's soldier brothers, Eliab and Abinadab, have no encouragement for their underage sibling's foolhardy venture and do all they can to crush it; but, with no one else showing a gram of moxie to stand against the taunting giant, Saul finally permits the confrontation and prepares for the young lad's certain death - a determined boy who stubbornly approaches the giant without sword, spear or protective leather vest.