¹ sn The fifth chapter falls into four main parts: separation of the unclean (vv. 1-4), restitution for sin (vv. 5-10), the jealousy ordeal (vv. 11-28), and the summary (vv. 29-31). There is a good deal of literature on the biblical theme of holiness (for which see the notes on Leviticus primarily). But with regard to this chapter, see (with caution), Mary Douglas, Purity and Danger; J. Neusner, The Idea of Purity in Ancient Judaism; and K. Milgrom, “Two Kinds of ḥaṭṭaʾat,” VT 26 (1976): 333-37.

¹ sn In chap. 3, the first part of this extensive call, Yahweh promises to deliver his people. At the hesitancy of Moses, God guarantees his presence will be with him, and that assures the success of the mission. But with chap. 4, the second half of the call, the tone changes sharply. Now Moses protests his inadequacies in view of the nature of the task. In many ways, these verses address the question, “Who is sufficient for these things?” There are three basic movements in the passage. The first nine verses tell how God gave Moses signs in case Israel did not believe him (4:1-9). The second section records how God dealt with the speech problem of Moses (4:10-12). And finally, the last section records God’s provision of a helper, someone who could talk well (4:13-17). See also J. E. Hamlin, “The Liberator’s Ordeal: A Study of Exodus 4:1-9, ” Rhetorical Criticism [PTMS], 33-42.