Valmiki Ramayana Aranya Kanda Sarga 73 Shloka 36

मेघवर्णाः like dark rainclouds, तरस्विनः swift, परमद्विपाः great elephants, संहृत्य drawn together, रुधिरधाराभिः streams of ichor(red in colour) flowing from their body, सिक्ताः are drenched, पृथक् separated, कीर्णाः scattered, प्रचरन्ति they wander.

The great, nimble elphants, dark like clouds, drenched with the flow of ichor come together and then separate and scatter.