Why are the author and location absent?
The seemingly careless handling of the author and the location is striking: someone testifies somewhere. The point is the testimony of God in Scripture. Who the speaker is, who is used by God as a mouthpiece, and where he has said it are of minor importance.1
6 It has been testified somewhere, “What is man, that you are mindful of him, or the son of man, that you care for him?