While declaring that he was a messenger of Sri Rama, Sri Hanuma admonishes Ravana, who practiced severe austerities and got so many boons, and yet abducted Sita.
लक्षिता इयम् मया सीता तथा शोक परायणा | गृह्य याम् न अभिजानासि पन्च आस्याम् इव पन्नगीम् || ५-५१-२३
"Capturing Seetha, whom you do not recognize as a five-hooded female serpent in your abode, has been found by me in that manner, and wholly given over to sorrow."
तपः सम्ताप लब्धः ते यो अयम् धर्म परिग्रहः | न स नाशयितुम् न्याय्य आत्म प्राण परिग्रहः || ५-५१-२५
"It is not proper for you to lose your exceptional longevity and that fortune which is an outcome of your virtue, both of which have been acquired by you through the practice of austerities."
याम् सीता इति अभिजानासि या इयम् तिष्ठति ते वशे || ५-५१-३४ काल रात्री इति ताम् विद्धि सर्व लन्का विनाशिनीम् |
"Know her, whom you recognize as Seetha and who stays in your captivity, to be none else than Kalaratri (the goddess presiding over and responsible for dissolution), who can destroy the entire Lanka."
Sage Valmiki described at different occasions almost all Vedic Pantheon in Srimad Ramayana. However, I did not come across KAALARATRI - काल रात्री.
Can anybody explain who this KAALARATRI - काल रात्री is?