What are these two matters?
Rashi: I will not be a widow, and not bereaved (8).
Why does it say "Rega b'Yom Echad"?
Radak: At night, Belshatzar ha'Melech was killed, and Paras and Madai entered and conquered the city
What is "Shechul v'Alman"?
Refer to 47:8:4:1, 3.
Radak: Youths and adults will die. The women will be widowed from their husbands and bereaved from their children.
What is "k'Sumam"?
Radak: When they are completed
Why does it say "b'Rov Keshafayich"?
Radak: [Even] with your great witchcraft [you will be afflicted]; it will not help you.
Malbim: This was not because you lost your Chachmah. Your witchcraft was very abundant.
Who are "Chavarayich"?
Rashi: They are witches. This is like "v'Chover Chaver" (Devarim 18:11).
Malbim: They are scientists and astrologers.