Unforgiveness always results in bad consequences
King David committed adultery with Bathsheba, a young married woman and killed her husband, Uriah, in order to cover it up. 2 Sam 10-12
Soon thereafter, David’s son Amnon raped his half-sister Tamar. Tamar’s full-brother, Absalom, was angry and could not forgive his half-brother Amnon, so he killed Amnon. David, with his own hands dirty from committing adultery and killing Uriah, did not discipline or correct his son Absalom for the killing of Amnon. But David also did not forgive Absalom for the killing of Amnon and refused to see Absalom or have anything to do with him. This angered Absalom, who in return could not forgive his father for refusing to see him. 2 Sam 13-14.
Eventually Absalom rebells against his father, King David. Absalom conquers the capital City of Jerusalem, and David flees . King David’s Chief Advisor, Ahithophel, defects and goes over to Absalom. Ahithophel advises Absalom to have sexual relations with all of the wives of his father, King David, that were left behind in the harem when David fled the City which Absalom does. This act by Absalom guaranteed that there could never be any reconciliation with his father. 2 Sam 15-19.
Turns out that Ahithophel is Bathsheba’s grandfather. Ahithophel never forgave David for what he did to Bathsheba and to Uriah. Ahithophel nursed his grudge until a time for revenge, which he did by advising Absalom to have sexual relations with the wives in David’s harem, an act from which there was turning back.
In the end, Ahithophel committed suicide. Absalom is killed, and his rebellion is crushed. David’s family is in total disarray, and his reign from there on until his death is troubled. All of this is the result of unforgiveness by three men: Ahithophel, David, and Absalom.
Teaching of Jesus on Forgiveness
Jesus taught that we should forgive our brother, even unto seventy times seven times, that is without limit. In deed Jesus taught that unforgiveness hinders our prayers and that we should forgive one another before continuing our prayers. Matt 18:15-35, Mark 11:22-26, Luke 11:2-4.