Andhakārasutta

sn56.46:2.1 When he said this, one of the mendicants said to the Buddha,

sn56.46:2.2 “Sir, that darkness really is mighty, so very mighty.

sn56.46:2.3 Is there any other darkness more mighty and terrifying than this one?”

sn56.46:2.4 “There is, mendicant.”