1 Kings 8:9

9. Nothing in the ark save the two tables These were apparently all, according to the Old Testament writers, that was ever placed in the ark. The pot of manna and Aaron’s rod were laid up before the Testimony, (Exodus 16:34; Numbers 17:10,) but this alone leaves it undecided whether they were placed in the ark or by the side of it. According to Hebrews 11:4, however, they were in the ark, which also held the Testimony; and this latter passage doubtless expresses the Jewish traditional view of their position before the Lord and before the Testimony, as stated in the passages referred to in Exodus and Numbers. The pot and the rod had probably become lost during the ark’s captivity among the Philistines.