2 Samuel 11-12 (13-14 for the narrative pairing concerning Tamar, Amnon, and Absalom), and 1 Kings 1-2.
Content warning: rape, murder, infant death. NOTE: God's casting judgement upon David for his sins results in the death of their first son. Despite seeing such things happen in scripture throughout this series, KNOW that God does not kill in judgement of our sins.
