Nehemiah quotes "the word that you commanded your servant Moses" (1:8). Where are those words?

Nehemiah doesn't say which passage he means, and these notes don't choose one. Several passages of the Law come close. For "If you trespass, I will scatter you among the peoples" (1:8), Deuteronomy has "The LORD will scatter you among the peoples" (Deuteronomy 4:27), with the same Hebrew verb for scatter and the same "among the peoples"; Leviticus has "I will scatter you among the nations" (Leviticus 26:33), with a different Hebrew verb. For the return and the gathering (1:9), Deuteronomy has "and return to the LORD your God and obey his voice" (Deuteronomy 30:2), and "If your outcasts are in the uttermost parts of the heavens, from there the LORD your God will gather you" (Deuteronomy 30:4); in Hebrew, 30:4 and 1:9 share the words for outcasts, the uttermost part of the heavens, from there and gather. For "the place that I have chosen, to cause my name to dwell there" (1:9), Deuteronomy has "the place which the LORD your God shall choose, to cause his name to dwell there" (Deuteronomy 12:11). And Leviticus 26 has confessing, trespass and remembering close together: "If they confess their iniquity and the iniquity of their fathers, in their trespass which they trespassed against me" (Leviticus 26:40), "then I will remember my covenant with Jacob" (Leviticus 26:42), with the Hebrew verbs Nehemiah uses for confess (1:6), trespass and remember (1:8). Nehemiah's words are close to these, not the same as any one of them.