NOT KNOWN FACTS ABOUT DAVID HOFFMEISTER WIKIPEDIA

[86] In panic that town of giants would want vengeance on David for killing the city's winner (Goliath) and many other Philistines, David pretended being insane. When he pretended to acquire insanity he manufactured marks on town's gate and Allow saliva drool into his beard.[87] Achish was repulsed by David's intended sanity and so he experienced h