Valmiki Ramayana Kishkindha Kanda Sarga 42 Shloka 43
Original Shlokaयोजनानां सहस्राणि दश तानि दिवाकरः। मुहूर्तार्धेन तं शीघ्रमभियाति शिलोच्चयम्।।4.42.43।।
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दिवाकरः Sun, मुहूर्तर्धेन in half a moment, योजनानाम् of yojanas, तानि those, दशसहस्राणि ten thousand, शिलोच्चयम् to the mountain ranges, शीघ्रम् swiftly, अभियाति reaches,
'Crossing ten thousand yojanas swiftly in half a moment, the Sun touches the mount behind which he sets.