Sometimes called The Book of the Wars of Yahweh. One source says "The quotation is in lyrical form, so it is possibly a book of poetry or a hymnal...Moses quoted it, so the date of its composition must have been prior to the completion of the Pentateuch, perhaps during the wanderings in the wilderness. Nothing else is known about it, and it survives only in Moses’ quotation."[1]
Rollston, Chris A. (April 2001). "Ben Sira 38:24–39:11 and The Egyptian Satire of the Trades". Journal of Biblical Literature. 120 (Spring): 131–139. doi:10.2307/3268597. JSTOR3268597.
Rollston, Chris A. (April 2001). "Ben Sira 38:24–39:11 and The Egyptian Satire of the Trades". Journal of Biblical Literature. 120 (Spring): 131–139. doi:10.2307/3268597. JSTOR3268597.