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

Peaceful

Peaceful as sleep.
—Beaumont and Fletcher

Peaceful as the advance of summer.
—Monçure D. Conway

Peaceful as stars at twilight.
—Victor Hugo

Peaceful as two pups in a basket.
—Alfred Henry Lewis

Peaceful as two six-shooters on the same belt.
—Alfred Henry Lewis

Peaceful … as a virgin lake.
—James Russell Lowell

Peaceful as summer woods.
—George MacDonald

Peaceful as a hired hand.
—James Whitcomb Riley

Peaceful as dew-mist from an evening sky.
—Bayard Taylor

Peaceful as falls the dew.
—William Winter

Peaceful as the morning.
—William Wordsworth