John Gill Commentary Esther 4:2

"and he came even before the king`s gate: for none might enter within the king`s gate clothed with sackcloth." — Esther 4:2 (ASV)

And came even before the king's gate
Or court, that Esther might if possible be made acquainted with this dreadful calamity coming upon her people:

for none might enter into the king's gate clothed with sackcloth :
or appear in such a dress at court, where nothing was admitted to damp the pleasures of it.