Saturday, or Shaniwar, is dedicated to Lord Shani. As it is believed that those who have the blessing of Lord Hanuman are protected from the effects of Shani Graha, Hanuman is also worshipped on the day by many Hindus. In some regions, the Narasimha incarnation of Lord Vishnu is also worshipped. The main mantras and prayers that are chanted are dedicated to Lord Shani.
The prayers that are chanted include the 108 names of Lord Shani (Shanaishchara Ashtottara Shatanamavali), Shani Stotram, the 108 names of Narasimha and some people also chant prayers dedicated to Lord Hanuman.
You can download 108 names of Lord Shani in PDF format from this link – Shani 108 names
You can download Shani Stotram in PDF format from this link – Shani Stotram
You can download Shri Narasimha Ashtottara Shatanamavali from this link – 108 names of Narasimha
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