Book of Deuteronomy have given various answers to the problem. The Deuteronomistic history theory is currently the most popular (Deuteronomy was originally just the law code and covenant, written to cement the religious reforms of Josiah, and later expanded to stand as the introduction to the full history); but there is an older theory which sees Deuteronomy as belonging to Numbers, and Joshua as a sort of supplement to it. This idea still has supporters, but the mainstream understanding is that Deuteronomy, after becoming the introduction to the history, was later detached from it and included with Genesis-Exodus-Leviticus-Numbers because it already had Moses
Old Testament theology in the Old Testament book of Exodus 3:13-15. Through this passage, readers can see the personality of God revealed. Because the earliest writing in the Hebrew language did not utilize vowel marks and the Hebrew people revered God so much that they declined to pronounce the name aloud, the true pronunciation of the name of God has been lost due to a lack of use. Medieval Jewish scholars developed a system for inserting vowel marks into the consonantal text. Due to the tradition of reading aloud the word "adonai" (my Lord) whenever YHWH was encountered in the text, scribes inserted