Then a powerful demon, a prowler through the dark,
nursed a hard grievance. It harrowed him
to hear the din of the loud banquet
every day in the hall, the harp being struck
and the clear song of a skilled poet
telling with mastery of man’s beginnings,
how the Almighty had made the earth
a gleaming plain girdled with waters;
in His splendour He set the sun and the moon
to be earth’s lamplight, lanterns for men,
and filled the broad lap of the world
with branches and leaves; and quickened life
in every other thing that moved.

Beowulf, Seamus Heaney (trans.)

Lines 86-98: The threat to Heorot comes in the form of the demon Grendel maddened by the bard’s recitation of the story of creation in the hall.