'Darkness' in the Bible

to give light to those who sit in darkness and in the shadow of death, to direct our feet into the way of peace."

Therefore pay careful attention [that] the light in you is not darkness!

Every day [when] I was with you in the temple [courts], you did not stretch out [your] hands against me! But this is your hour and the domain of darkness!"

And by this time it was about the sixth hour, and darkness came over the whole land until the ninth hour