The Book of Deuteronomy is the fifth book of the Bible and the last of the Pentateuch or Torah, the five books written by Moses. Deuteronomy contains three sermons given by Moses to the Israelites who are to enter the promised land. The word Deuteronomy means 'second law giving' as the book reiterates the laws God has given to His people for the generation of Israelites who were not present when the laws were first given.
Deuteronomy 32:43
Rejoice, O ye nations, with his people: for he will avenge the blood of his servants, and will render vengeance to his adversaries, and will be merciful unto his land, and to his people