Jeremiah 41:4

And it came to pass, the second day after he had slain
Gedaliah
That is, the day following, for it was in the night, as Josephus relates, as before observed, the murder was committed: and no man knew [it];
not any out of the city, or in remote parts; for those that were in the city must be sensible of it; but as yet the report of it had not reached the neighbourhood, and much less distant parts; this is observed on account of the following story, and to show how easily the persons after mentioned were drawn in by Ishmael.