Mercy Upon Mercy, I Samuel 25-26, OT S1:E170

A wise woman Abigail interceeds with David on behalf of her arrogant husband and convinces David that showing mercy is a better way to get your way than acting in wrath. In the very next chapter, David has opportunity to kill Saul, but chooses mercy instead. Despite David's propensity towards violence, he exercises much mercy in these chapters.