"The Book of the Righteous"

Hi,

"Shemuel II 1:18 says, 'And [King David] said to teach the Judeans the bow; this is recorded in Sefer haYashar [The Book of the Righteous].' What is Sefer haYashar?

"Rabbi Chiyya bar Abba cited Rabbi Yochanan: This is the book of Avraham, Yitzchak and Yaakov, who are called righteous [yesharim], as in Bamidbar 23:10, [when Bilam said:] "'May my death be that of the righteous [yesharim].'...

"Rabbi Eliezer said: This is Mishneh Torah [Devarim]. Why is it called Sefer haYashar? Devarim 6:18 says, 'You shall perform that which is righteous [yashar] and good.'...

"Rabbi Shemuel bar Nachmeni said: This is the Book of Shoftim [Judges]. Why is it called Sefer haYashar? Shoftim 17:6 says, 'In those days there was no king in Israel; one would do that which was righteous [yashar] in his eyes.'..."

(Talmud, Avodah Zarah 25a)

Have a great day,

Mordechai