When Shabbat occurs on Chol Hamoed of either Sukkot or Passover, the Torah verses Exodus 33:12–34:26 are read in the morning, but what verses are read at the Minchah service in the afternoon?
2 Answers
Basically, it is whatever the reading would have been had it been a regular shabbos, so the reading from the next parsha. The reason is that we don't read the Torah by Mincha on holidays (except Yom Kippur) so it is actually a regular Shabbos reading, and not a holiday reading.
My machazor (Rödelheim editions) give the following (Pessach vol. 2, Sukkot vol. 1):
Pessach: Shemini, except in a leap-year, where Acharei-Mot is read instead
Sukkot: Vezot haBerachah