Deuteronomy 31:19

This song, which is contained Deu 32, and is put into a song that it may be better learned, and more fixed in their minds and memories. Put it in their mouths; cause them to learn it, and sing it one to another, to oblige them to more circumspection and watchfulness. A witness for me; of my kindness in giving them so many blessings, of my patience in bearing so long with them, of my clemency in giving them such fair and plain warnings, and my justice in punishing such an unthankful, perverse, and incorrigible people.