It's implied in the Bible in many different ways but not exactly worded that way. It may closest be phrased in: Miguel de Cervantes (1547-1616): “Let us forget and forgive injuries.” “Don Quixote de la Mancha. read more
Miguel de Cervantes (1547-1616): “Let us forget and forgive injuries.” “Don Quixote de la Mancha.” Biblical text does suggest: Matthew 6:12 ESV. And forgive us our debts, as we also have forgiven our debtors. This may be the closest to the phrase “forgive and forget” in the Bible. Talking about debts, not being wronged. read more
Both pardon and hold no resentment concerning a past event. For example, After Meg and Mary decided to forgive and forget their differences, they became good friends . This phrase dates from the 1300s and was a proverb by the mid-1500s. For a synonym, see let bygones be bygones. read more