'Shadows' in the Bible

“Until the cool of the day when the shadows flee away,Turn, my beloved, and be like a gazelleOr a young stag on the mountains of Bether.”

“Until the cool of the dayWhen the shadows flee away,I will go my way to the mountain of myrrhAnd to the hill of frankincense.

“Prepare war against her;Arise, and let us attack at noon.Woe to us, for the day declines,For the shadows of the evening lengthen!