Now in the ark there was nothing else but the two tables of stone, which Moses put there at Horeb, when the Lord made a covenant with the children of Israel, when they came out of the land of Egypt.

“The words "there was nothing in the ark except the two tablets of stone" does not mean that the author did not know that there were also the jar [containing the manna], the staff [of Aaron], and so forth. He simply wants to signify all the rest by mentioning the most important part, because he writes for the Jews who already knew the other objects.”

“There was nothing in the ark, save the two tables of stone which Moses put there at Horeb,.... That is, there were no other writings; or, as Ben Gersom says, no other part of the law, but the decalogue otherwise he observes there were in it Aaron's rod and the pot of manna, according to Heb 9:4 though the particle there may be rendered "at", or "with", or "by"; see Gill on Heb 9:4 and so they might be not within it, but in some place on the sides of it, see Deu 31:26, when the Lord made a covenant with the children of Israel, when they came out of the land of Egypt; about two months after.”

“Nothing else, &c. There was nothing else but the tables of the law within the ark. But on the outside of the ark, or near the ark, were also the rod of Aaron, and a golden urn with manna, Hebrews ix. 4. (Challoner) (Worthington) — These might have been in the ark while it was not fixed: but after the temple was built, all but the tables were placed in the treasury; where, we find, the book of the law was discovered, under Joas, Deuteronomy xxxi. 26., and 2 Paralipomenon xxxiv. 14. Others think that, in the days of St. Paul, the rod, &c., might have been reposited in the ark, though they had not been admitted at the time when this book was written. (Bellarmine, &c.) — But we have no assurance that the ark was ever placed in the second temple; and Josephus informs us, that when the Romans destroyed the temple, “there was nothing at all” in the sanctuary. (Calmet) — In area might easily signify ad, or juxta arcam, “near the ark.” (Salien)”