After his marriage, Jaffe continued to live in Nesvizh until the death of Rabbi Shlomo in July 1792, who was killed by the Cossack army.[5] Following that development, he began to lead a community of Hasidism in Lyakhavichy, Belarus.[6] His followers numbered in the thousands, and as he grew more popular, he was arrested in 1799 by the Russian government due to opposition to his practices by Russian elite. He was arrested along with Rabbi Shneur Zalman of Liadi and Rabbi Asher of Stolin, and was released later in the year.[7]
He was appointed to serve as president of the Holy Land Fund on behalf of Kollel Raysin (of Belarus), where he worked extensively to financially support the Hasidic community in Eretz Yisrael, travelling to collect funds for them.[8]
Jaffe died in Stolin on 18 January 1810 (13 Shvat 5570), present in the city for the wedding of his grandson Rabbi Shlomo Chaim Perlov.[7] His children surviving him were:
Rabbi Noach of Lechovitch, who succeeded him in the Lechovitch dynasty and as treasurer of the Kollel Raysin[4]
Rabbi Aharon of Lechovitch, who married the daughter of Rabbi Asher of Stolin and died before his father on 3 Shvat 5566 (20 January 1806)[1]
Now I have come to speak to their hearts, to restore the crown to its formerly
glory in the golden age, the gold of that land, good for those who dwell before
G-d in the land of the living, and what I will ask of them, and one of my
questions to which I wish to awake, the point of their hearts burning like fire in
the flames of fire and the flame of the LORD, to the land of the living, which is
our share and the pleasantness of our destiny, one fate to G-d, and Jacob, his
inheritance and ours to Israel with him. And do not be in their eyes as an old
diotagma, only a new pland from the land of Israel. And awaken, please be
generous for his generosity, to the crop that has come from them for two
years which he has not demanded, and now they shall hold their land fiercely
to his people, may he give and return and give at once a broad heart, and a
new love in the holy affection shall be renewed among them... And I will pray
to G-d through our land, and from the children to me will hear, and the living
will let his heart be a complete act of righteousness in the square, very much
commanded with joy and kindness.
As the disciple of Rabbi Shlomo, Jaffe followed in the footsteps of Karlin Hasidism, which emphasizes the importance of prayer with enthusiasm. He also emphasized among his followers the need for simple faith by memorizing Maimonides' 13 Tenets of Faith. His commentary of the Torah was printed in many books, such as his grandson Rabbi Shalom of Breihin-Koidinov's "Divre Shalom", "Mishmeret Shalom", "Or Yasharim",[10] "Torat Avot",[11] and "Mira Dachia".[12]