Wine was before him] LXX has 'wine was before me,' implying that it was Nehemiah's turn to act as cup-bearer (the king having several). This would explain why Artaxerxes had not observed his servant's sadness during the four months that had elapsed since the arrival of the news from Jerusalem.
Related Commentaries of Nehemiah 2:1
Nehemiah 2:1
1 And it came to pass in the month Nisan, in the twentieth year of Artaxerxes the king, that wine was before him: and I took up the wine, and gave it unto the king. Now I had not been beforetime sad in his presence.