And once the god had made that great and massive shield
he made Achilles a breastplate brighter than gleaming fire.
he made him a sturdy helmet to fit the fighter’s temples.
beautiful, burnished work, and raised its golden crest
and made him greaves of flexing, pliant tin.
– Homer
The Iliad, Book 18, lines 710-714. Having completed the great shield for Achilles for his return to war, Hephaestus then creates for him a sturdy helmet and a breastplate brighter than fire (metaphor).