Valmiki Ramayana Yuddha Kanda Sarga 3 Shloka 27
Original Shlokaन्यर्बुदंरक्षसामत्राप्युत्तरद्वारमाश्रितम् । रथिनश्चाश्ववाहाश्चकुलपुत्त्रास्सुपूजिताः ।।6.3.27।।
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अत्र: there, रक्षसाम्: rakshasas, न्यर्बुदम्: one hundred crores, उत्तरद्वारम्: northern gate, अपि: even, आश्रितम्: garrisoned, रथिनः charioteers, अश्ववाहाश्च: horse riders and elephant riders,सुपूजिताः well respected trust worthy ones, कुलपुत्राः born in noble families
At the northern gate(of Lanka) are garrisoned one hundred crores of rakshasas constituting, charioteers, horse riding and elephant riding ogres born of noble families, respected and trustworthy (for Ravana).