1 Corinthians 15:3
Book: 1 Corinthians 15
For I delivered unto you first of all that which also I received: that Christ died for our sins according to the scriptures;
Numbers 33:50
Book: Numbers 33
And Jehovah spake unto Moses in the plains of Moab by the Jordan at Jericho, saying,
Deuteronomy 31:22
Book: Deuteronomy 31
So Moses wrote this song the same day, and taught it the children of Israel.