Emmanuel Levinas compares ethical responsibility to a maternal body who bears the Other in the same without assimilation. In explicating this trope, he refers to a biblical passage in which Moses is like a "wet nurse" bearing Others whom he has "neither conceived nor given birth to" (Num. 11:12). A close reading of this passage raises questions about ethics, maternity, and sexual difference, for both the concept of ethical substitution and the material practice of mothering.