¹ sn The number sixty-six includes the seventy-one descendants (including Dinah) listed in vv. 8-25 minus Er and Onan (deceased), and Joseph, Manasseh, and Ephraim (already in Egypt).

⁵ tn Heb “he ruined [it] to the ground.” The direct object is implied. Onan deliberately got rid of his semen on the ground so that his brother’s widow would not become pregnant.

² sn The number seventy includes Jacob himself and the seventy-one descendants (including Dinah, Joseph, Manasseh, and Ephraim) listed in vv. 8-25, minus Er and Onan (deceased). The LXX gives the number as “seventy-five” (cf. Acts 7:14).

³ sn The purpose of the custom was to produce an heir for the deceased brother. Onan had no intention of doing that. A possible motivation is that if there was an heir for his older brother, it would have decreased his share of inheritance significantly. But he would have sex with the girl as much as he wished. He was willing to use the law to gratify his desires, but was not willing to fulfill his responsibilities.