C. F. Keil and Franz Delitzsch on 1 Samuel 30:17

1Sa 30:17

David surprised them in the midst of their security, and smote them from the evening twilight till the evening of the next day, so that no one escaped, with the exception of four hundred young men, who fled upon camels. Nesheph signifies the evening twilight here, not the dawn, - a meaning which is not even sustained by Job 7:4. The form מחרתם appears to be an adverbial formation, like יומם.