George Leo Haydock, on Neh 6:5

“And Sanaballat sent his servant to me the fifth time according to the former word, and he had a letter in his hand written in this manner:”

“Letter. Hebrew, Septuagint, and Arabic add, “open:” but this word is not in Syriac. The letter might be an order to appear, or might be left open to signify that the bearer was a man of confidence, from whom Nehemias might receive any farther information; unless it was sent in this manner out of contempt. — Gossem, the Arabian governor, chap. ii. 19. (Calmet)”

Imported from an open dataset — not yet checked against the printed edition.