Halakha Yosua 1:2: Abudarham

Rabbeinu Saadia wrote: a sabbath where there is mourning for a sage, conclude with the portion of I Samuel 4:1–22. And I found written in a responsa asked to the rabbi Shmuel ben Gershon, and this was his word and what was told to you, that when the Rambam of blessed memory passed away, when the congregation was gathered to the synagogue, they read the blessings and curses, and concluded prophetically with "Moses My servant is dead" (Joshua 1:2). Thus we have also heard, that Abba Mari of blessed memory wrote in his laws of mourning: when Rabbeinu Sherira, the father of Rabbeinu Hai, died, they read that Sabbath the portion of Numbers 27:15–23, and concluded with I Kings 2:1–21, but in place of the verse "And Solomon sat on the throne of David his father" they read "and Hai sat on the throne of Sherira his father, and his reign was greatly established."