Moses wrote this song … and taught it to the people: see verses 30, 44.

The same day: or “that same day” (Good News Translation). This means the same day when the LORD spoke to Moses and told him to do this.

Quoted with permission from Bratcher, Robert G. and Hatton, Howard A. A Handbook on Deuteronomy. (UBS Helps for Translators). New York: UBS, 2000. For this and other handbooks for translators see here .