Albert Barnes Commentary Esther 5:3

"Then said the king unto her, What wilt thou, queen Esther? and what is thy request? it shall be given thee even to the half of the kingdom." — Esther 5:3 (ASV)

It shall be even given thee... - Xerxes, on another occasion, when pleased with one of his wives, offered to grant her any request whatever, without limitation. Compare the margin reference.