'Gallows' in the Bible

Then Zeresh his wife and all his friends said to him, "Let a gallows be made fifty cubits high, and in the morning speak to the king about hanging Mordecai on it. Then go in merrily with the king to the banquet." This pleased Haman, so he had the gallows made.

The king said, "Who is in the court?" Now Haman had come into the outer court of the king's house, to speak to the king about hanging Mordecai on the gallows that he had prepared for him.

Then Harbonah, one of the eunuchs who were with the king said, "Behold, the gallows fifty cubits high, which Haman has made for Mordecai, who spoke good for the king, is standing at Haman's house." The king said, "Hang him on it!"

So they hanged Haman on the gallows that he had prepared for Mordecai. Then was the king's wrath pacified.

Then King Ahasuerus said to Esther the queen and to Mordecai the Jew, "See, I have given Esther the house of Haman, and him they have hanged on the gallows, because he laid his hand on the Jews.

Then Esther said, "If it pleases the king, let it be granted to the Jews who are in Shushan to do tomorrow also according to this day's decree, and let Haman's ten sons be hanged on the gallows."

but when this became known to the king, he commanded by letters that his wicked device, which he had devised against the Jews, should return on his own head, and that he and his sons should be hanged on the gallows.