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As the people are about to enter Eretz Yisrael, Moshe reviews many of the crucial Mitzvot and incidents of the last 40 years, and also will introduce 70 Mitzvot that were not discussed earlier.
Moshe gently rebukes the nation for their moments of rebellion and lack of faith - particularly the incident of the Spies - but also reminds them of Hashem's protective Hand which guided and sheltered them in the wilderness.
Yehoshua is encouraged to continue the path of Moshe as the nation's new leader.
The Haftora - always read on the Shabbat before the 9th of Av - is "Chazon Yeshayahu," the Vision of Isaiah, describing the destruction of Yerushalayim, as well as its ultimate redemption. The verses of destruction are read in the mournful Eicha tune.
The fast of Tisha B'Av begins at sunset of Motzei Shabbat and concludes on Sunday night
