Valmiki Ramayana Aranya Kanda Sarga 32 Shloka 7
Original Shlokaदेवासुरविमर्देषु वज्राशनिकृतव्रणम्। ऐरावतविषाणग्रैरुद्घृष्टकिणवक्षसम्।।3.32.7।।
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देवासुरविमर्देषु in encounter between gods and demons, वज्राशनिकृतव्रणम् wounded by missiles and thunderbolts, ऐरावतविषाणाग्रैः by the tips of the tusks of elephant Airavata, उद्धृष्टकिणवक्षसम् marks of scars on the chest.
He had scars of wounds caused by the thunderbolt received in war between gods and demons, and marks of scars on his chest made by tips of the the tusks of elephant Airavata.