Deuteronomy 31:9, 19
Deuteronomy 31:9 ASV
And Moses wrote this law, and delivered it unto the priests the sons of Levi, that bare the ark of the covenant of Jehovah, and unto all the elders of Israel.
Deuteronomy 31:19 ASV
Now therefore write ye this song for you, and teach thou it the children of Israel: put it in their mouths, that this song may be a witness for me against the children of Israel.