Esther 5:13

Haman said moreover, Yea, Esther the queen did let no man come in with the king unto the banquet that she had prepared but myself; and to morrow am I invited unto her also with the king.

Then said Zeresh his wife and all his friends unto him, Let a gallows be made of fifty cubits high, and to morrow speak thou unto the king that Mordecai may be hanged thereon: then go thou in merrily with the king unto the banquet. And the thing pleased Haman; and he caused the gallows to be made.