המוריה, same as האמוריה, “the land of the Emorite.” It happens frequently that the letter א is missing, just as in our verse. One such example is found in Exodus 10,21 וימש חשך, where the word וימש should really have been ויאמש חשך, “causing darkness.” Another example of the letter א being missing is found in Isaiah 13,20, where instead of לא יהל we would have expected לא יאהל, “he will pitch his tent.”