V’Zucharti… Bris Yaakov, Yitzchok and Avrohom. Many questions on this Posuk, beginning with an introduction ‘why the Tochacha is called a Bris’. The three Avos are listed backwards, there are two extra ‘es’ in the posuk and twice the word ‘af’ among others. Rashi, E. Ezra, Chizkuni, R. Bechayey, Tzyuni, RaMbaN, Shach, Kli Yakar, Ma’amar of the Alter Rebbe.