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

Sober

As sober as an ice-cream soda on New Year’s Eve.
—Anonymous

Sober as if he had supped with Diogenes.
—Edward Bulwer-Lytton

Sober as a judge.
—Henry Fielding

Sober as a hymn.
—William Ernest Henley

Sober as is the tender voice of home.
—Lewis Morris

Sober as a vicar.
—John G. Saxe