The Holy Ghost told him he could reach more people here than at churches

2 Samuel 3:14? 2 Samuel 3:14, David sends messengers to Ish-bosheth, Saul's son, demanding the return of his wife Michal, whom he had been betrothed to for the price of a hundred Philistine foreskins.

I've heard of guys storing a few foreskins in their refrigerator, but 100 is pretty outrageous and this was a time before you could refrigerate them.