Numbers 23:10

The righteous] The people of Israel are called 'the righteous' because God, who is Himself righteous, has called them to be the same. The Heb word for 'righteous' is Jashar, and Jeshurun is a poetical name given to Israel in Deuteronomy 32:15; Deuteronomy 33:5; Deuteronomy 33:26; Isaiah 44:2. It is possible that the title given to a collection of national poetry, the book of Jashar (see Joshua 10:13; 2 Samuel 1:18 : see on Numbers 21:14) contains the same idea. Balaam's words mean that Israel's fate will be enviable, and the opposite of what Balak desires it to be. His own fate was miserable: see Numbers 31:8. The death of the righteous is only attained by those who are willing to lead the life of the righteous.