Yes, in "Night" by Elie Wiesel, repetition is a literary technique he employs to emphasize the themes of despair, loss, and the struggle for faith during the Holocaust. In Chapter one, you may notice the frequent mentions of words related to darkness, night, silence, and questions of faith.
For instance, Wiesel often uses the word "night" itself, which symbolizes the darkness of the human experience he is describing. Phrases related to God, faith, and the experiences of the Jewish community are also recurring. This repetition serves to enhance the emotional impact of his narrative and underline the overwhelming sense of hopelessness and fear experienced during this horrific period.
If you're looking for specific examples or a deeper analysis of how repetition shapes the text’s meaning, feel free to ask!