14 Therefore it is said in the Book of the Wars of the LORD, "Waheb in Suphah, the valleys of the Arnon,
Numbers 21:14 Cross References - NHEB
Joshua 10:13
13 The sun stood still, and the moon stayed, until the nation had avenged themselves of their enemies. Isn't this written in the book of Jashar? The sun stayed in the midst of the sky, and did not hurry to go down about a whole day.
2 Samuel 1:18
18 and said it should be taught to the people of Judah. Look, it is written in the book of Jashar.