Ecclesiastes 9:12

For man also does not know his time: Like fish taken in a cruel net, Like birds caught in a snare, So the sons of men are snared in an evil time, When it falls suddenly upon them.

Surrounding context

9:11 I returned and saw under the sun that-- The race is not to the swift, Nor the battle to the strong, Nor bread to the wise, Nor riches to men of understanding, Nor favor to men of skill; But time and chance happen to them all.

9:12 For man also does not know his time: Like fish taken in a cruel net, Like birds caught in a snare, So the sons of men are snared in an evil time, When it falls suddenly upon them.

9:13 This wisdom I have also seen under the sun, and it seemed great to me:

Translation and sources