Frank J. Wilstach, comp. A Dictionary of Similes. 1916.

Immovable

Immovable as the figure of Mercury.
—Anonymous

Grenadiers … stood their ground immovable, like rocks, steadily spouting fire-torrents.
—Thomas Carlyle

Immovable as a pump or a lamp-post.
—Charles Dickens

Immovable as a leopard crouching in the jungle.
—Gustave Flaubert

Immovable as a picture.
—Gustave Flaubert

Immovable, as if it were painted on the wall.
—Nathaniel Hawthorne

Immovable as a setter at the scent of quail.
—O. Henry

Immovable, like the owner’s names, cut in brass, and nailed to their doors.
—Thomas Holcroft

Immovable in the flow of the rout as rocks in running water.
—Victor Hugo

Immovable as a man of iron.
—Charles Kingsley

Immovable as the sun.
—Theognis