אדם כי יקריב מכם קרבן לה’ (ויקרא א:ב)

Medrash says “מכם ולא משה” – from among you and not from Moshe.

The Gemara says (נדרים י) that when one sacrifices a Korban, they shouldn’t say “לה’ קרבן”; instead, they should say “קרבן לה’” – because if he says “לה’” first, and he does not continue saying קרבן, it comes out that he said Hashem’s name for naught.  This is what the Medrash means: “אדם כי יקריב מכם “קרבן לה” – a person needs to say it in this order because he doesn’t know when he will die.  However, Moshe Rabbeinu can say “לה’ קרבן” since he knew when he was going to die, and he didn’t need to be afraid that he would die while saying this.