Valmiki Ramayana Yuddha Kanda Sarga 64 Shloka 4
Original Shlokaस्थानंवृद्धिं च हानि च देशकालविभागवित् । आत्मनश्चपरेषां च बुध्यतेराक्षसर्षभः ।।6.64.4।।
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देशकालविभागवित् conversant with rules of time and place, राक्षसर्षभः bull among Rakshasas, आत्मनः च his own, परेषां च enemies also, स्थानम् place, वृद्धिं च progress, हानिं च and decline also, बुध्यते knows.
"Ravana, a bull among Rakshasas is conversant with rules of time and place and knows his own enemies, his progress and decline also."