'Song' in the Bible

“Now then, write this song for yourselves, and teach it to the sons of Israel; put it in their mouth, so that this song may be a witness for Me against the sons of Israel.

Then it shall come about, when many evils and troubles have come on them, that this [sacred] song will confront them as a witness; for it will not be forgotten from the mouth of their descendants. For I know their inclination which is developing even now, before I bring them into the land which I have sworn to give them.”

So Moses wrote this song the same day, and taught it to the children of Israel.

Then Moses spoke in the hearing of all the congregation of Israel the words of this song, until they were ended:

Then Moses came and spoke all the words of this song in the hearing of the people, he and Joshua the son of Nun.