smooth as glass

*smooth as glass

 and *smooth as silk
Cliché smooth and shiny. (often used to describe calm bodies of water. *Also: as ~.) The bay is as smooth as glass, so we should have a pleasant boat trip. This custard is smooth as silk.
See also: glass, smooth
References in classic literature ?
The sidewalks were superb marble slabs polished as smooth as glass, and the curbs that separated the walks from the broad street were also set thick with clustered emeralds.
As you look over the pond westward you are obliged to employ both your hands to defend your eyes against the reflected as well as the true sun, for they are equally bright; and if, between the two, you survey its surface critically, it is literally as smooth as glass, except where the skater insects, at equal intervals scattered over its whole extent, by their motions in the sun produce the finest imaginable sparkle on it, or, perchance, a duck plumes itself, or, as I have said, a swallow skims so low as to touch it.
From above it seemed as though rope and cliff were well-nigh touching, but now, when swinging a hundred feet down, the squire found that he could scarce reach the face of the rock with his foot, and that it was as smooth as glass, with no resting-place where a mouse could stand.
The broad Indian river, that looked more like a chain of little lakes than a stream, was as smooth as glass, reflecting the sandy-red sky in mid-channel, but splashed with patches of yellow and dusky purple near and under the low banks.
And I see a bay, a wide bay, smooth as glass and polished like ice, shimmering in the dark.
in quiet, when the surface is again as smooth as glass,