One who contributes from his wealth for the purpose of writing or publishing a sefer of a Tzaddik –
Behold, at any given time, and in any corner of the world, that a person studies from this sefer, the Tzaddik [on high] evokes merit on behalf of the donor through whom the sefer was disseminated.
—The Rebbe, Igrot Kodesh, vol 2
By: Rabbi Yehudah Leib of Yanovitch
Halachic responsa by Rabbi Yehudah Leib of Yanovitch, brother of the Alter Rebbe, Rabbi Schneur Zalman of Liadi, author of Tanya and Shulchan Aruch.
She`erit Yehudah is renown for its great halachic profundity, as the author was a close confidant and associate in Torah matters of his illustrious brother.
This book contains many oral rulings that R. Yehudah Leib heard directly from his brother.