Valmiki Ramayana Yuddha Kanda Sarga 121 Shloka 5

तदा then, लोकस्य in the world, साक्षी witness, पावकः fire god, रामम् to Rama, अब्रवीत् spoke तु you, राम Rama, एषा this way, ते you, वैदेही Vaidehi, अस्याम् she, पापम् sin, न विद्यते not know

Then the fire god who is a witness in the world, spoke to Rama," Here is your wife Vaidehi and she does not know any sin."