Treasury of Scripture Knowledge
And Moses wrote this law, and delivered it unto the priests the sons of Levi, which bare the ark of the covenant of the LORD, and unto all the elders of Israel.
It came about, when Moses finished writing the words of this law in a book until they were complete,
“Now it shall come about when he sits on the throne of his kingdom, he shall write for himself a copy of this law on a scroll
in the presence of the Levitical priests.
When Aaron and his sons have finished covering the holy objects and all the furnishings of the sanctuary, when the camp is to set out, after that the sons of Kohath shall come to carry them, so that they will not touch the holy objects
and die. These are the things in the tent of meeting which the sons of Kohath are to carry.
and they commanded the people, saying, “When you see the
ark of the covenant of the Lord your God with the Levitical priests carrying it, then you shall set out from your place and go after it.
Now Joshua rose early in the morning, and the priests took up the ark of the Lord.
1 Kings 8:3
Then all the elders of Israel came, and
the priests took up the ark.
1 Chronicles 15:2
Then David said, “
No one is to carry the ark of God but the Levites; for the Lord chose them to carry the ark of God and to minister to Him forever.”
So Moses wrote this song the same day, and taught it to the sons of Israel.