ratri suktam

just as we chant aghamarshana sooktam during bath, before going to sleep it is customary to chant ratri suktam

They are found here:

http://www.ambahouse.org/ratrisuktam.shtml

Pl see the attachments
Another version is tantrokta ratri suktam
http://www.indif.com/nri/mantras/devi_suktam01.asp

Atha Tantroktam Devi Suktam  II
Chandi Path

Contd...

Ya devi sarvabhuteshu, Vishnu mayeti shabdita I
Namastastyai II Namastastyai II Namastastyai namo namaha II6II

II Meaning II We bow to the divine Goddess in all existence who is addressed as the perceivable form of the consciousness which pervades all. We bow to her, we bow to her, we continually bow to her.

Ya devi sarvabhuteshu, Chetanetyabhi dhiyate I
Namastastyai II Namastastyai II Namastastyai namo namaha II7II

II Meaning II We bow to the divine Goddess in all existence who resides all throughout the Consciousness and is known by the reflections of mind. We bow to her, we bow to her, we continually bow to her.

Ya devi sarvabhuteshu, Buddhi rupena samsthita I
Namastastyai II Namastastyai II Namastastyai namo namaha II8II

II Meaning II We bow to the divine Goddess in all existence who resides in the form of intelligence. We bow to her, we bow to her, we continually bow to her.

Ya devi sarvabhuteshu, Nidra rupena samsthita I
Namastastyai II Namastastyai II Namastastyai namo namaha II9II

II Meaning II We bow to the divine Goddess in all existence who resides in the form of Sleep. We bow to her, we bow to her, we continually bow to her.

Ya devi sarvabhuteshu, Ksudha rupena samsthita I
Namastastyai II Namastastyai II Namastastyai namo namaha II10II

II Meaning II We bow to the divine Goddess in all existence who resides in the form of Hunger. We bow to her, we bow to her, we continually bow to her.