The very sacred sloka of Lord Sri Rama: Sri Rama Rama Rameti Rame Rame Manorame... if chanted daily, is equal to chanting Sri Vishnu Sahasra Nama Stotram. This is mentioned by Lord Shiva to Goddess Parvati, as mentioned below:
Goddess Parvati asked "O lord what is the short method to recite Vishnu Sahasranaam (if I am not able). What is to be chanted for it?"
ishwara uvAcha:
sri rAma rAma rAmethi rame rAme manorame | sahasranAma thatthulyam rAma nAma varAnane |
Ishwara said, "O beautiful one, Chant Rama Rama Rama which rejoices the mind. It is equal to thousand names of Vishnu (Sri Vishnu Sahasranamam)."
