To Fear the Setting Sun is a Tamkaranu execration text, written in the late seventh millennium. Unusually for execration texts, it was recorded not once but rather repeatedly, a major factor in its survival to the present day. Fragments of To Fear the Setting Sun, inscribed on clay tablets, have been found along the eastern coast of the Chaska Sea from near Alashta in the north to as far south as Tabas.
Written in an archaic version of the Chaskan language, To Fear the Setting Sun was inscribed and then broken to curse an invader from across the sea. Though their identity has long since been lost, they were evidently seen as a major threat if the same text invoking them was shattered repeatedly and near-simultaneously.
As is typical for execration texts, the first line of the text is used as its title.