O Winter! bar thine adamantine doors. The north is thineöthere hast thou built thy dark Deep-founded habitation. Shake not thy roofs, Nor bend thy pillars with thine iron car.

-Blake,William
  Poetical Sketches,'To Winter'.

Him the Almighty Power Hurled headlong flaming from th'ethereal sky With hideous ruin and combustion down To bottomless perdition, there to dwell In adamantine chains and penal fire.

-Milton,John
  Paradise Lost (published1667), bk.1, l.44^8.