Keil & Delitzsch, on Esth 2:21

“At that time, therefore, when Mardochai abode at the king’s gate, Bagathan and Thares, two of the king’s eunuchs, who were porters, and presided in the first entry of the palace, were angry: and they designed to rise up against the king, and to kill him.”

“The definition of time in Est 2:19 is again take up by the words: in those days; then the explanatory clause, Est 2:20, is repeated; and after this we are informed what it was that had then occurred. In those days Bigthan and Teresh, two of the king's courtiers, who were the threshold-keepers (palace-watchers, lxx ἀρχισωματοφύλακες), were wroth, and sought to lay hands on King Ahashverosh, i.e., to slay him. Est 2:22. This thing was known to Mordochai, and by him communicated to Esther, who told it, in Mordochai's name, to the king. Est 2:23. The matter was investigated (sc. by the king), and found out, sc. as Mordochai had testified. The two criminals were hanged on a tree, i.e., impaled on a stake, a sort of crucifixion, - see rem. on Est 6:11, - and the circumstance entered in the book of the chronicles, i.e., the chronicles of the kingdom. המּלך לפני, before the king, i.e., in his presence, immediately after sentence had been passed by a court over which the monarch presided.”

Imported from an open dataset — not yet checked against the printed edition.