22 But Mordecai learned of the plot and told Queen Esther, who then told King Xerxes, giving credit to Mordecai. When the thing was investigated and confirmed as true, the two men were hanged on a gallows. This was all written down in a logbook kept for the king's use.
Matthew Henry's Commentary on Esther 2:22
Commentary on Esther 2:21-23
(Read Esther 2:21-23)
Good subjects must not conceal any bad design they know of against the prince, or the public peace. Mordecai was not rewarded at the time, but a remembrance was written. Thus, with respect to those who serve Christ, though their recompence is not till the resurrection of the just, yet an account is kept of their work of faith and labour of love, which God is not unrighteous to forget. The servant of God must be faithful to every trust, and watchful for those who employ him. If he appear to be neglected now, he will be remembered hereafter. None of our actions can be forgotten; even our most secret thoughts are written in lasting registers, Revelation 20:12.