An ancient book of national songs, which most likely contained both religious and secular songs describing great events in the history of the nation. In the OT there are two quotations from this book
Then speaketh Joshua to Jehovah in the day of Jehovah's giving up the Amorites before the sons of Israel, and he saith, before the eyes of Israel, 'Sun -- in Gibeon stand still; and moon -- in the valley of Ajalon;' and the sun standeth still, and the moon hath stood -- till the nation taketh vengeance on its enemies; is it not written on the Book of the Upright, 'and the sun standeth in the midst of the heavens, and hath not hasted to go in -- as a perfect day?'
The Roebuck, O Israel, On thy high places is wounded; How have the mighty fallen! Declare it not in Gath, Proclaim not the tidings in the streets of Ashkelon, Lest they rejoice -- The daughters of the Philistines, Lest they exult -- The daughters of the Uncircumcised! read more. Mountains of Gilboa! No dew nor rain be on you, And fields of heave-offerings! For there hath become loathsome The shield of the mighty, The shield of Saul -- without the anointed with oil. From the blood of the wounded, From the fat of the mighty, The bow of Jonathan Hath not turned backward; And the sword of Saul doth not return empty. Saul and Jonathan! They are loved and pleasant in their lives, And in their death they have not been parted. Than eagles they have been lighter, Than lions they have been mightier! Daughters of Israel! for Saul weep ye, Who is clothing you in scarlet with delights. Who is lifting up ornaments of gold on your clothing. How have the mighty fallen In the midst of the battle! Jonathan! on thy high places wounded! I am in distress for thee, my brother Jonathan, Very pleasant wast thou to me; Wonderful was thy love to me, Above the love of women! How have the mighty fallen, Yea, the weapons of war perish!'