hares are said to sleep with their eyes open
a 1700 - A New Dictionary of the Terms Ancient and Modern of the Canting Crew, B.E.
Hare-sleep "with Eies a'most open"
From: Tales, Anecdotes and Letters
Translated from the Arabic and Persian
By Jonathan Scott, 1800
Letters, Letter VIII
Aurungzebe to Sultaun Shujah