The king took his ring from his hand. Rather, "took his signet from his hand." This may have been a ring, for signet-rings were known to the Persians, but is perhaps more likely to have been a cylinder, like that of Darius, his father, which is now in the British Museum.
And gave it unto Haman. Thus giving him the power of making whatsoever edicts he pleased, since nothing was requisite to give authority to an edict but the impression of the royal seal (see Herod; 3:128).
For similar acts of confidence see Genesis 41:42; Esther 8:2. The Jews' enemy. Rather, "persecutor."