He hath taken - Literally, "The money bag he hath taken in his hand." He is gone a journey of itinerant merchandising. This seems to be what is intended.
And will come home at the day appointed - ליום הכסא leyom hakkase, the time fixed for a return from such a journey. The Vulgate says, "at the full moon." The Targum, "the day of the assembly." In other words, He will return by the approaching festival.

He hath taken a bag of money with him,.... Or, "in his hand" (a); either for merchandise, as Gersom; or for defraying: the charges of his journey; and both suppose length of time: if for merchandise, it required time to purchase goods, and see them packed up and sent away; or if for his journey, since it was not a few pieces of money he put in his pocket to defray expenses, but a bag of it he carried in his hand, it shows that he should be out a considerable time;
and will come home at the day appointed; and not before: Aben Ezra interprets it, at the beginning of the month, at the new moon, when the moon is covered (b), which Horace (c) calls "tricessima sabbata": but rather it is to be understood of the full moon, as Aquila and the Vulgate Latin version render it; when it is light all night, and so a proper time for travelling home again. Gersom takes it to mean the beginning of the year, when the holy blessed God, parabolically speaking, sits upon a throne to judge the world in righteousness: the Targum calls it the day of the congregation; some fixed festival day, when the congregation meets together; and at such a festival, or appointed time, this good man had fixed for his return, and when, and not before, he would. This she says to remove all fears from the young man of being surprised and caught by her husband. There is an appointed time for Christ's second coming, when he will certainly come, and not before; and which is supposed to be at a great distance of time: and therefore wicked men and seducers, and such as the apostate church of Rome make use of to encourage themselves in their wickedness, in hopes of impunity, put the evil day far away from them; but in the appointed time Christ will come, and call his servants to an account, good and bad.
(a) "in manu sua", Pagninus, Montanus, Mercerus, Gejerus, Michaelis. (b) "in die plenae lunae", V. L. Michaelis; "novilunii", so some in Vatablus, Piscator; "ad diem interlunii", Cocceius, Schultens. (c) Satirar. l. 1. Sat. 9. v. 69.

the day appointed--perhaps, literally, "a full moon," that is, a fortnight's time (compare Proverbs 7:19).

Hath taken - Which is an evidence that he designs to stay a considerable time. At the day - So that we need not fear any surprise.