ιδου verb - second aorist active middle - second person singular
idou  id-oo': used as imperative lo!; -- behold, lo, see.
προειρηκα verb - perfect active indicative - first person singular
proereo  pro-er-eh'-o: to say already, predict -- foretell, say (speak, tell) before.
υμιν personal pronoun - second person dative plural
humin  hoo-min': to (with or by) you -- ye, you, your(-selves).