C. F. Keil and Franz Delitzsch on Esther 2:14

Est 2:14

In the evening she went (to the king), and on the morrow she returned to the women’s house, a second (time) to the hand (under the keeping of) Shaashgaz, the king’s chamberlain, who kept the concubines; she came no more to the king, except the king delighted in her and she were called by name, i.e., specially. שׁני instead of שׁנית, like Neh 3:30.