In the book "Night" by Elie Wiesel, Ellie's father died while they were both prisoners in a concentration camp during the Holocaust. Ellie did not get to say goodbye to his father before he died because the conditions in the concentration camp were extremely harsh and dehumanizing. The prisoners were subjected to forced labor, malnutrition, disease, and abuse, and they were constantly under the threat of death. In this environment, there was little time or opportunity for personal interactions or farewells. Additionally, the Nazis running the concentration camp showed little regard for the prisoners' emotional needs or familial ties, and they often separated family members or prevented them from communicating with each other. Therefore, Ellie's inability to say goodbye to his father was a result of the brutal and inhumane conditions of the concentration camp and the cruelty of the Nazi regime.