Excerpt from Hamlet by Shakespeare:
last night of all
Which is of a bigger excerpt from Act 1 Scene 1 as:
Barnardo:Last night of all, When yond same star that's westward from the pole Had made his course t’ illume that part of heaven Where now it burns, Marcellus and myself, The bell then beating one—— [Enter Ghost.]
Why not just last night?
I didn't find an explanation in Internet or dictionary.